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Publication: Cairns, Stephen D., Dale R. Calder, Anita Brinckmann-Voss, Clovis B. Castro, Daphne G. Fautin,... 2002. Common and Scientific Names of Aquatic Invertebrates from the United States and Canada: Cnidaria and Ctenophora, Second Edition, 2002. American Fisheries Society Special Publication 28. xi + 115.

ITIS records citing this publication
 
 Kingdom Animalia
  Abietinaria abietina (Linnaeus, 1758) -- valid -- sea fir
  Abietinaria alexanderi Nutting, 1904 -- valid
  Abietinaria amphora Nutting, 1904 -- valid
  Abietinaria anguina (Trask, 1857) -- valid
  Abietinaria annulata (Kirchenpauer, 1884) -- valid
  Abietinaria costata (Nutting, 1901) -- valid
  Abietinaria expansa Fraser, 1938 -- valid
  Abietinaria filicula (Ellis and Solander, 1786) -- valid -- fern hydroid, fern hydroid
  Abietinaria gigantea (Clark, 1877) -- valid
  Abietinaria gracilis Nutting, 1904 -- valid
  Abietinaria greenei (Murray, 1860) -- valid
  Abietinaria inconstans (Clark, 1877) -- valid
  Abietinaria kincaidi (Nutting, 1901) -- valid
  Abietinaria pacifica Stechow, 1923 -- valid
  Abietinaria pulchra (Nutting, 1904) -- valid
  Abietinaria rigida Fraser, 1911 -- valid
  Abietinaria thuiarioides (Clark, 1877) -- valid
  Abietinaria traski (Torrey, 1902) -- valid
  Abietinaria turgida (Clark, 1877) -- valid
  Abietinaria variabilis (Clark, 1877) -- valid
  Abyla bicarinata Moser, 1925 -- valid
  Abyla haeckeli Lens and van Riemsdijk, 1908 -- valid
  Abyla trigona Quoy and Gaimard, 1827 -- valid
  Abylidae Agassiz, 1862 -- valid
  Abylopsis eschscholtzi (Huxley, 1859) -- valid
  Abylopsis tetragona (Otto, 1823) -- valid
  Acanthoptilum agassizi Kölliker, 1872 -- valid
  Acanthoptilum album Nutting, 1909 -- valid
  Acanthoptilum annulatum Nutting, 1909 -- valid
  Acanthoptilum gracile (Gabb, 1862) -- valid
  Acanthoptilum oligacis Bayer, 1957 -- valid
  Acanthoptilum scalpellifolium Moroff, 1902 -- valid
  Acaulidae -- valid
  Acaulis primarius Stimpson, 1854 -- valid
  Acryptolaria abies (Allman, 1877) -- valid
  Acryptolaria conferta (Allman, 1877) -- valid
  Acryptolaria longitheca (Allman, 1877) -- valid
  Acryptolaria pulchella (Allman, 1888) -- valid
  Acryptolaria rectangularis (Jarvis, 1922) -- valid
  Acryptolaria triserialis (Fraser, 1913) -- valid
  Actinodiscidae -- valid
  Actinulida Swedmark and Teissier, 1958 -- valid
  Adelogorgia phyllosclera Bayer, 1958 -- valid
  Aegina citrea Eschscholtz, 1829 -- valid -- golf tee medusa
  Aeginidae -- valid
  Aeginopsis laurentii Brandt, 1838 -- valid
  Aeginura grimaldii Maas, 1904 -- valid
  Aequorea aequorea (Forsskål, 1775) -- invalid
  Aequorea albida A. Agassiz, 1862 -- valid
  Aequorea coerulescens (Brandt, 1838) -- valid
  Aequorea floridana (L. Agassiz, 1862) -- valid
  Aequorea forskalea Péron and Lesueur, 1810 -- valid
  Aequorea tenuis (A. Agassiz, 1862) -- valid
  Aequorea victoria (Murbach and Shearer, 1902) -- valid -- water jellyfish, water jellyfish
  Aequoreidae -- valid
  Agalma elegans (M. Sars, 1846) -- valid
  Agalma okeni Eschscholtz, 1825 -- valid
  Agalmatidae Brandt, 1835 -- valid
  Aglantha digitale (O. F. Müller, 1776) -- valid -- pink helmet
  Aglaophenia apocarpa Allman, 1877 -- valid
  Aglaophenia constricta Allman, 1877 -- valid
  Aglaophenia diegensis Torrey, 1904 -- valid
  Aglaophenia dispar Fraser, 1948 -- valid
  Aglaophenia diversidentata Fraser, 1948 -- valid
  Aglaophenia dubia Nutting, 1900 -- valid
  Aglaophenia epizoica Fraser, 1948 -- valid
  Aglaophenia fluxa Fraser, 1948 -- valid
  Aglaophenia inconspicua Torrey, 1904 -- valid
  Aglaophenia integriseptata Fraser, 1948 -- valid
  Aglaophenia latecarinata Allman, 1877 -- valid
  Aglaophenia lateseptata Fraser, 1948 -- valid
  Aglaophenia latirostris Nutting, 1900 -- valid
  Aglaophenia octocarpa Nutting, 1900 -- valid
  Aglaophenia perforata Allman, 1885 -- invalid
  Aglaophenia perpusilla Allman, 1877 -- invalid
  Aglaophenia pinguis Fraser, 1938 -- valid
  Aglaophenia pluma (Linnaeus, 1758) -- valid -- podded hydroid, podded hydroid
  Aglaophenia prominens Fraser, 1938 -- valid
  Aglaophenia rhynchocarpa Allman, 1877 -- valid
  Aglaophenia struthionides (Murray, 1860) -- valid -- ostrichplume hydroid, ostrichplume hydroid
  Aglaophenia tridentata Versluys, 1999 -- valid
  Aglaophenia trifida L. Agassiz, 1862 -- valid
  Aglaopheniidae -- valid
  Aglaophenoides mammillatus (Nutting, 1900) -- invalid
  Aglaura hemistoma Péron and Lesueur, 1810 -- valid
  Aglauropsis aeora Mills, J. T. Rees and Hand, 1976 -- valid
  Alcyonacea Lamouroux, 1816 -- valid -- soft corals, soft corals
  Alcyonaria Dana, 1846 -- invalid
  Alcyoniidae Lamouroux, 1812 -- valid -- true soft corals
  Alcyoniina -- valid -- true soft corals
  Alcyonium digitatum Linnaeus, 1758 -- valid -- dead man's fingers
  Alcyonium rudyi Verseveldt and van Ofwegen, 1992 -- valid
  Alcyonium sidereum Verrill, 1922 -- valid
  Amphicaryon acaule Chun, 1888 -- valid
  Amphicaryon ernesti Totton, 1954 -- valid
  Amphinema australis (Mayer, 1900) -- valid
  Amphinema dinema (Péron and Lesueur, 1809) -- valid
  Amphinema platyhedos Arai and Brinckmann-Voss, 1983 -- valid
  Amphinema rugosum (Mayer, 1900) -- valid
  Amphinema turrida (Mayer, 1900) -- valid
  Amphisbetia erecta (Fraser, 1938) -- valid
  Amphisbetia furcata (Trask, 1857) -- valid
  Amphisbetia kurilae (Nutting, 1904) -- valid
  Amphisbetia operculata (Linnaeus, 1758) -- valid
  Angelopsis globosa Fewkes, 1886 -- valid
  Annatira affinis (Hartlaub, 1913) -- invalid
  Antennella avalonia Torrey, 1902 -- valid
  Antennella gracilis Allman, 1977 -- invalid
  Antennella quadriaurita Ritchie, 1909 -- valid
  Antennella secundaria (Gmelin, 1791) -- valid
  Anthoathecatae -- valid -- athecate hydroids, hydromedusae
  Anthomedusae Haeckel, 1879 -- invalid -- athecate hydroids
  Anthopodium rubens Verrill, 1872 -- valid
  Anthoptilidae -- valid
  Anthoptilum grandiflorum (Verrill, 1879) -- valid
  Anthothela grandiflora (Sars, 1856) -- valid
  Anthothela tropicalis Bayer, 1961 -- valid
  Anthothelidae Broch, 1916 -- valid
  Anthozoa Ehrenberg, 1834 -- valid -- água viva, anêmona, anémones de mer, antozoário, caravela, corais, corals, coraux, flower animals, gorgônia, sea anemones
  Antipatharia Milne-Edwards and Haime, 1857 -- valid -- black corals, thorny corals
  Antipathes americana Duchassaing and Michelotti, 1860 -- valid
  Antipathes atlantica Gray, 1857 -- valid -- grey sea fan black coral
  Antipathes barbadensis Brook, 1889 -- valid -- scraggly bottle brush black coral
  Antipathes brooki Johnson, 1899 -- invalid
  Antipathes caribbeana Opresko, 1996 -- valid -- Kings coral
  Antipathes expansa Opresko and Cairns, 1992 -- valid
  Antipathes furcata Gray, 1857 -- valid
  Antipathes gracilis Gray, 1860 -- valid -- orange sea fan black coral
  Antipathes hirta Gray, 1857 -- valid -- bottle brush bush black coral, bottle brush coral
  Antipathes lenta Pourtalès, 1871 -- valid -- hair net black coral
  Antipathes pedata Gray, 1857 -- valid
  Antipathes pennacea Pallas, 1766 -- valid -- bottle brush coral, feather black coral
  Antipathes tanacetum Pourtalès, 1880 -- valid -- bottle brush black coral
  Antipathes thamnea Warner, 1981 -- valid
  Antipathidae Ehrenberg, 1834 -- valid
  Aphanipathes abietina (Pourtalès, 1874) -- valid
  Aphanipathes humilis (Pourtalès, 1867) -- valid
  Aphanipathes thyroides (Pourtalès, 1880) -- valid
  Apolemia uvaria (Leseuer, 1815) -- valid
  Apolemiidae -- valid
  Arthrogorgia utinomii Bayer, 1996 -- valid
  Aselomaris michaeli Berrill, 1948 -- valid
  Athecatae -- invalid
  Athorybia lucida Biggs, 1978 -- valid
  Athorybia rosacea (Forskål, 1775) -- valid
  Athorybiidae Huxley, 1859 -- valid
  Atolla parva Russell, 1958 -- valid
  Atolla tenella Hartlaub, 1909 -- valid
  Atolla vanhoeffeni Russell, 1957 -- valid
  Atolla wyvillei Haeckel, 1880 -- valid
  Atollidae -- valid
  Atorella octogonos Mills, Larson and Youngbluth, 1987 -- valid
  Atorella octogonus Mills, Larson and Youngbluth, 1987 -- invalid
  Atorella vanhoeffeni H. B. Bigelow, 1909 -- valid
  Atorellidae -- valid
  Aurelia aurita (Linnaeus, 1758) -- valid -- moon jelly, moon jelly
  Aurelia labiata Chamisso and Eysenhardt, 1821 -- valid
  Aurelia limbata Brandt, 1835 -- valid -- brownbanded moon jelly, brownbanded moon jelly
  Aureliinae L. Agassiz, 1862 -- valid
  Bargmannia amoena Pugh, 1999 -- valid
  Bargmannia elongata Totton, 1954 -- valid
  Bargmannia lata Mapstone, 1998 -- valid
  Bassia bassensis (Quoy and Gaimard, 1833) -- valid
  Bathyphysa conifera (Studer, 1878) -- valid
  Bebryce grandis Deichmann, 1936 -- valid
  Bebryce parastellata Deichmann, 1936 -- valid
  Benthocodon pedunculata (H. B. Bigelow, 1913) -- valid
  Bimeria humilis Allman, 1877 -- invalid
  Bimeria tunicata Fraser, 1943 -- invalid
  Bimeria vestita Wright, 1859 -- valid
  Blackfordia manhattensis Mayer, 1910 -- valid
  Blackfordia virginica Mayer, 1910 -- valid
  Blackfordiidae -- valid
  Bonneviella regia (Nutting, 1901) -- valid
  Bonneviellidae -- valid
  Botruanthus benedeni (Torrey and Kleeburger, 1909) -- valid
  Botrucnidiferidae -- valid
  Botrynema brucei Browne, 1908 -- valid
  Botrynema ellinorae (Hartlaub, 1909) -- valid
  Bougainvillia britannica (Forbes, 1841) -- valid
  Bougainvillia carolinensis (McCrady, 1857) -- valid
  Bougainvillia frondosa Mayer, 1900 -- valid
  Bougainvillia glorietta Torrey, 1904 -- valid
  Bougainvillia inaequalis Fraser, 1944 -- valid
  Bougainvillia muscus (Allman, 1863) -- valid
  Bougainvillia niobe Mayer, 1894 -- valid
  Bougainvillia principis (Steenstrup, 1850) -- valid
  Bougainvillia ramosa (van Beneden, 1844) -- invalid
  Bougainvillia rugosa Clarke, 1882 -- valid
  Bougainvillia superciliaris (L. Agassiz, 1849) -- valid
  Bougainvilliidae Lütken, 1850 -- valid
  Briareum asbestinum (Pallas, 1766) -- valid -- corky sea finger, corky seafinger, deadman's fingers
  Briaridae -- valid
  Bythotiara depressa Naumov, 1960 -- valid
  Bythotiara huntsmani (Fraser, 1911) -- valid
  Bythotiara stilbosa Mills and Rees, 1979 -- valid
  Calcaxonia -- valid
  Callicarpa chazaliei Versluys, 1899 -- valid -- plumed hydroid, plumed hydroid
  Callogorgia kinoshitae Kükenthal, 1913 -- valid
  Callogorgia verticillata (Pallas, 1766) -- valid
  Calpasoma dactylopterum Fuhrmann, 1939 -- valid
  Calycella gracilis Hartlaub, 1897 -- valid
  Calycella syringa (Linnaeus, 1767) -- valid -- creeping bell hydroid, creeping bell hydroid
  Calycellidae -- valid
  Calycophorae -- valid
  Calycopsidae Bigelow, 1913 -- invalid
  Calycopsis bigelowi Vanhöffen, 1911 -- valid
  Calycopsis nematophora Bigelow, 1913 -- valid
  Calycopsis papillata Bigelow, 1918 -- valid
  Calycopsis typa Fewkes, 1882 -- valid
  Campanularia castellata Fraser, 1925 -- valid
  Campanularia crenata Allman, 1876 -- invalid
  Campanularia emarginata Fraser, 1938 -- valid
  Campanularia fasciculata Fraser, 1941 -- invalid
  Campanularia fragilis Hincks, 1863 -- invalid
  Campanularia fusiformis Clark, 1876 -- invalid
  Campanularia gigantea Hincks, 1866 -- invalid
  Campanularia groenlandica Levinsen, 1893 -- valid
  Campanularia hincksii Alder, 1856 -- valid
  Campanularia macroscypha Allman, 1877 -- valid
  Campanularia ritteri Nutting, 1901 -- valid
  Campanularia speciosa Clark, 1877 -- invalid
  Campanularia urceolata Clark, 1877 -- invalid
  Campanularia volubilis (Linnaeus, 1758) -- valid
  Campanulariidae -- valid
  Campanulina rugosa Nutting, 1901 -- invalid
  Candelabridae Stechow, 1921 -- valid
  Candelabrum frichtmanni Hewitt & Goddard, 2001 -- invalid
  Candelabrum phrygium (Fabricius, 1780) -- valid
  Carijoa operculata (Bayer, 1961) -- valid
  Carijoa riisei (Duchassaing and Michelotti, 1860) -- valid -- white telesto
  Carybdea alata Reynaud, 1830 -- valid
  Carybdea marsupialis (Linnaeus, 1758) -- valid
  Carybdeidae Gegenbaur, 1856 -- valid
  Cassiopea frondosa (Pallas, 1774) -- valid
  Cassiopea xamachana R. P. Bigelow, 1892 -- valid
  Cassiopeidae -- valid -- upside-down jellyfish, upsidedown jellyfishes
  Catablema multicirratum Kishinouye, 1910 -- valid
  Catablema nodulosa Bigelow, 1913 -- valid
  Catablema nodulosum Bigelow, 1913 -- invalid
  Catablema vesicarium (A. Agassiz, 1862) -- valid -- constricted jellyfish, constricted jellyfish
  Ceratocymba dentata (H. B. Bigelow, 1918) -- valid
  Ceratocymba leuckarti (Huxley, 1859) -- valid
  Ceratocymba sagittata (Quoy and Gaimard, 1827) -- valid
  Ceriantharia Perrier, 1893 -- valid -- tube-dwelling anemones, tube-dwelling anemones
  Ceriantheomorphe brasiliensis Carlgren, 1931 -- valid
  Ceriantheopsis americana (Verrill, 1862) -- valid
  Cerianthidae Milne-Edwards and Haime, 1852 -- valid
  Cerianthus borealis Verrill, 1873 -- valid
  Ceriantipatharia Van Beneden, 1898 -- invalid
  Chelophyes appendiculata (Eschscholtz, 1829) -- valid
  Chelophyes contorta (Lens and van Riemsdijk, 1908) -- valid
  Chirodropidae Haeckel, 1880 -- valid
  Chiropsalmus quadrumanus (Müller, 1859) -- valid
  Chlorohydra hadleyi Forrest, 1959 -- valid
  Chlorohydra viridissima (Pallas, 1766) -- valid -- green hydra
  Chromatonema rubrum Fewkes, 1882 -- valid
  Chrysaora achlyos Martin et al., 1997 -- valid
  Chrysaora fuscescens Brandt, 1835 -- valid
  Chrysaora melanaster Brandt, 1835 -- valid
  Chrysaora quinquechirrha (Desor, 1848) -- invalid -- sea nettle
  Chuniphyes moserae Totton, 1954 -- valid
  Chuniphyes multidentata Lens and van Riemsdijk, 1908 -- valid
  Cirrhitiara superba (Mayer, 1900) -- valid
  Cirrholovenia tetranema Kramp, 1959 -- valid
  Cirrholoveniidae -- valid
  Cladocarpus dolichotheca Allman, 1877 -- valid
  Cladocarpus flexilis Verrill, 1885 -- valid
  Cladocarpus gracilis Fraser, 1948 -- valid
  Cladocarpus integer (G. O. Sars, 1874) -- valid
  Cladocarpus moderatus Fraser, 1948 -- valid
  Cladocarpus obliquus Nutting, 1900 -- valid
  Cladocarpus paradiseus Allman, 1877 -- valid
  Cladocarpus pinguis Fraser, 1948 -- valid
  Cladocarpus septatus Nutting, 1900 -- valid
  Cladocarpus sigma (Allman, 1877) -- valid
  Cladocarpus tenuis Clarke, 1879 -- valid
  Cladocarpus vancouverensis Fraser, 1914 -- valid
  Cladocarpus ventricosus Allman, 1877 -- valid
  Cladocoryne floccosa Rotch, 1871 -- valid
  Cladocoryne pelagica Allman, 1876 -- invalid
  Cladocorynidae Allman, 1872 -- valid
  Cladonema californicum Hyman, 1947 -- valid
  Cladonema myersi Rees, 1949 -- valid
  Cladonema radiatum Dujardin, 1843 -- valid
  Cladonema uchidai Hirai, 1958 -- valid
  Cladonematidae Gegenbaur, 1857 -- valid
  Clausophyes galeata Lens and van Riemsdijk, 1908 -- valid
  Clausophyes moserae Margulis, 1988 -- valid
  Clausophyes ovata (Keferstein and Ehlers, 1860) -- valid
  Clausophyidae -- valid
  Clava leptostyla L. Agassiz, 1862 -- invalid
  Clava multicornis (Forsskål, 1775) -- valid -- club hydroid, club hydroid
  Clavidae McCrady, 1859 -- invalid
  Clavularia modesta (Verrill, 1874) -- valid
  Clavulariidae Hickson, 1894 -- valid
  Cleistocarpida -- valid
  Clytia attenuata (Calkins, 1899) -- valid
  Clytia bakeri Torrey, 1904 -- invalid
  Clytia bicophora L. Agassiz, 1862 -- invalid
  Clytia coronata (Clarke, 1879) -- invalid
  Clytia cylindrica L. Agassiz, 1862 -- invalid
  Clytia denticulata (Clark, 1877) -- valid
  Clytia discoida (Mayer, 1900) -- valid
  Clytia edwardsi (Nutting, 1901) -- invalid
  Clytia exilis Fraser, 1948 -- valid
  Clytia fascicularis Fraser, 1938 -- valid
  Clytia folleata (McCrady, 1859) -- valid
  Clytia fragilis Congdon, 1907 -- invalid
  Clytia gelatinosa (Mayer, 1900) -- valid
  Clytia globosa (Mayer, 1900) -- valid
  Clytia gracilis (M. Sars, 1850) -- valid
  Clytia gregaria (L. Agassiz, 1862) -- valid
  Clytia hemisphaerica (Linnaeus, 1767) -- valid
  Clytia hemispherica (Linnaeus, 1767) -- invalid
  Clytia hendersoni Torrey, 1904 -- valid
  Clytia hesperia (Torrey, 1904) -- valid
  Clytia irregularis Fraser, 1938 -- valid
  Clytia johnstoni (Alder, 1856) -- invalid
  Clytia kincaidi (Nutting, 1899) -- valid
  Clytia languida (L. Agassiz, 1862) -- invalid
  Clytia linearis (Thornely, 1900) -- valid
  Clytia lomae (Torrey, 1909) -- valid
  Clytia macrotheca (Perkins, 1908) -- valid
  Clytia mccradyi (Brooks, 1888) -- valid
  Clytia minuta (Nutting, 1901) -- invalid
  Clytia noliformis (McCrady, 1859) -- valid
  Clytia paulensis (Vanhöffen, 1910) -- valid
  Clytia singularis (Mayer, 1900) -- valid
  Clytia universitatis Torrey, 1904 -- valid
  Cnidaria Hatschek, 1888 -- valid -- água viva, anêmona, caravela, cnidaires, cnidarians, cnidario, coelenterates, coelentérés, coral, hidra
  Cnidoscyphus marginatus (Allman, 1877) -- valid
  Colobonema sericeum Vanhöffen, 1902 -- valid -- silky medusa
  Colobonema typicum (Maas, 1897) -- valid
  Corallimorpharia Stephenson, 1937 -- valid
  Corallimorphidae -- valid
  Cordagalma cordiforme Totton, 1932 -- valid
  Cordylophora caspia (Pallas, 1771) -- valid -- freshwater hydroid, freshwater hydroid
  Cordylophora lacustris Allman, 1844 -- invalid
  Coronatae -- valid -- crown jellyfish, crown jellyfishes
  Corydendrium fruticosum Fraser, 1914 -- valid
  Corydendrium parasiticum (Linnaeus, 1767) -- valid
  Corymorpha bigelowi (Maas, 1905) -- valid
  Corymorpha forbesi (Mayer, 1894) -- valid
  Corymorpha gracilis (Brooks, 1882) -- valid
  Corymorpha groenlandica (Allman, 1876) -- valid
  Corymorpha nutans M. Sars, 1835 -- valid
  Corymorpha palma Torrey, 1902 -- valid -- fairy palm hydroid, fairypalm hydroid
  Corymorpha pendula L. Agassiz, 1862 -- valid
  Corymorphidae Allman, 1872 -- valid
  Corynactis californica Carlgren, 1936 -- valid -- strawberry corallimorpharian, strawberry corallimorpharian
  Corynactis delawarei Widersten, 1976 -- valid
  Corynactis parvula Duchassaing and Michelotti, 1860 -- valid
  Coryne brachiata Nutting, 1901 -- valid
  Coryne cliffordi (Brinckmann-Voss, 1989) -- valid
  Coryne corrugata Fraser, 1925 -- valid
  Coryne crassa Fraser, 1914 -- valid
  Coryne eximia Allman, 1859 -- valid
  Coryne hincksi Bonnevie, 1898 -- invalid
  Coryne hincksii Bonnevie, 1898 -- valid
  Coryne japonica (Nagao, 1962) -- valid
  Coryne producta (Wright, 1858) -- valid
  Coryne pusilla Gaertner, 1774 -- valid
  Corynidae Johnston, 1836 -- valid
  Craseoa lathetica Pugh and Harbison, 1987 -- valid
  Craspedacusta sowerbyi Lankester, 1880 -- valid -- freshwater jellyfish
  Craterolophinae -- valid
  Craterolophus convolvulus (Johnston, 1835) -- valid
  Crossota alba H. B. Bigelow, 1913 -- valid
  Crossota rufobrunnea (Kramp, 1913) -- valid
  Crypthelia glossopoma Cairns, 1986 -- valid
  Cryptolaria pectinata (Allman, 1888) -- valid
  Cryptophyton goddarti Williams, 2000 -- invalid
  Crystallophyes amygdalina Moser, 1925 -- valid
  Cubaia aphrodite Mayer, 1894 -- valid
  Cubozoa -- valid -- água viva, box jellyfish, cubozoário, medusas altas, sea wasps
  Cunina duplicata Maas, 1893 -- valid
  Cunina frugifera Kramp, 1948 -- valid
  Cunina globosa Eschscholtz, 1829 -- valid
  Cunina octonaria McCrady, 1859 -- valid
  Cunina peregrina H. B. Bigelow, 1909 -- valid
  Cuninidae -- valid
  Cuspidella costata Hincks, 1868 -- valid
  Cuspidella grandis Hincks, 1868 -- valid
  Cuspidella humilis (Alder, 1862) -- valid
  Cuspidella procumbens Kramp, 1911 -- valid
  Cyanea capillata (Linnaeus, 1758) -- valid -- lion's mane, lion's mane
  Cyaneidae L. Agassiz, 1862 -- valid
  Cyclocanna welshi H. B. Bigelow, 1918 -- valid
  Cystonectae -- valid
  Cytaeididae L. Agassiz, 1862 -- valid
  Cytaeis tetrastyla Eschscholtz, 1829 -- valid
  Deepstaria enigmatica Russell, 1967 -- valid
  Deepstariinae Larson, 1986 -- valid
  Dentitheca dendritica (Nutting, 1900) -- valid
  Depastridae Haeckel, 1879 -- valid
  Desmophyes annectens Haeckel, 1888 -- valid
  Desmophyes haematogaster Pugh, 1992 -- valid
  Dichotomia cannoides Brooks, 1903 -- valid
  Dicodonium floridana Mayer, 1900 -- valid
  Dicodonium jeffersoni (Mayer, 1900) -- valid
  Dicoryne conferta (Alder, 1856) -- valid
  Dicoryne flexuosa G. O. Sars, 1874 -- valid
  Dictyocladium flabellum Nutting, 1904 -- invalid
  Dimophyes arctica (Chun, 1897) -- valid
  Diodogorgia nodulifera (Hargitt and Rogers, 1901) -- valid -- colorful sea rod
  Diphasia alata (Hincks, 1855) -- invalid
  Diphasia corniculata (Murray, 1860) -- valid
  Diphasia digitalis (Busk, 1852) -- valid
  Diphasia fallax (Johnston, 1847) -- valid
  Diphasia kincaidi (Nutting, 1901) -- invalid -- sea pine hydroid
  Diphasia pinastrum (Cuvier, 1830) -- valid -- sea pine hydroid
  Diphasia pulchra Nutting, 1904 -- invalid
  Diphasia rosacea (Linnaeus, 1758) -- valid -- lily hydroid, lily hydroid
  Diphasia tropica Nutting, 1904 -- valid
  Diphyes bojani (Eschscholtz, 1829) -- valid
  Diphyes dispar Chamisso and Eysenhardt, 1821 -- valid
  Diphyidae -- valid
  Dipleurosoma collapsum (Mayer, 1910) -- valid
  Dipleurosoma ochraceum Mayer, 1910 -- valid
  Dipleurosoma typicum Boeck, 1866 -- valid
  Dipleurosomatidae -- valid
  Diplocheilus allmani Torrey, 1904 -- invalid
  Diplocraspedon limbata Brandt, 1838 -- invalid
  Dipurena bicircella J. T. Rees, 1977 -- valid
  Dipurena halterata (Forbes, 1846) -- valid
  Dipurena ophiogaster Haeckel, 1879 -- valid
  Dipurena strangulata McCrady, 1859 -- valid
  Discosoma carlgreni (Watzl, 1922) -- valid -- forked-tentacle corallimorpharian
  Discosoma neglectum (Duchassaing and Michelotti, 1860) -- valid -- umbrella corallimorpharian
  Discosoma sanctithomae (Duchassaing and Michelotti, 1860) -- valid -- warty corallimorpharian
  Distichopora foliacea Pourtalès, 1868 -- valid
  Drifa glomerata (Verrill, 1869) -- valid
  Dromalia alexandri H. B. Bigelow, 1911 -- valid
  Drymonema dalmatinum Haeckel, 1880 -- valid
  Duva florida (Rathke, 1806) -- valid
  Dynamena crisioides Lamouroux, 1824 -- valid
  Dynamena dalmasi (Versluys, 1899) -- valid
  Dynamena dispar (Fraser, 1938) -- valid
  Dynamena disticha (Bosc, 1802) -- valid
  Dynamena pumila (Linnaeus, 1758) -- valid -- sea oak
  Dynamena quadridentata (Ellis and Solander, 1786) -- valid
  Dynamena tropica Stechow, 1926 -- valid
  Echinomuricea atlantica (Johnson, 1862) -- invalid
  Ectopleura americana Petersen, 1990 -- valid
  Ectopleura crocea (L. Agassiz, 1862) -- valid
  Ectopleura dumortieri (van Beneden, 1844) -- invalid
  Ectopleura dumortierii (van Beneden, 1844) -- valid
  Ectopleura grandis Fraser, 1944 -- valid
  Ectopleura larynx (Ellis and Solander, 1786) -- valid -- ringed tubularia
  Ectopleura marina (Torrey, 1902) -- valid
  Ectopleura pacifica Mayer, 1900 -- valid
  Egmundella fasciculata Fraser, 1940 -- valid
  Egmundella gracilis Stechow, 1921 -- valid
  Eirene gibbosa (McCrady, 1857) -- valid
  Eirene lactea (Mayer, 1900) -- valid
  Eirene mollis (Torrey, 1909) -- valid
  Eirene pyramidalis (L. Agassiz, 1862) -- valid
  Eirenidae Haeckel, 1879 -- valid
  Eleutherocarpida -- valid
  Ellisella barbadensis (Duchassaing and Michelotti, 1864) -- valid -- devil's sea whip
  Ellisella elongata (Pallas, 1766) -- valid -- long sea whip, sea whip
  Ellisella grandis (Verrill, 1901) -- valid
  Ellisella schmitti Bayer, 1961 -- valid -- bushy sea whip
  Ellisellidae Gray, 1859 -- valid
  Endothecium dyssymetrum (Billard, 1929) -- invalid
  Enneagonum hyalinum Quoy and Gaimard, 1827 -- valid
  Eperemetus typus H. B. Bigelow, 1915 -- valid
  Epizoanthidae Gray, 1867 -- valid
  Epizoanthus abyssorum Verrill, 1885 -- valid
  Epizoanthus americanus (Verrill, 1864) -- valid -- American zoanthis
  Epizoanthus hians McMurrich, 1898 -- valid
  Epizoanthus incrustatus (Duben and Koren, 1847) -- valid
  Epizoanthus induratum Cutress and Pequegnat, 1960 -- valid -- luminescent zoanthid, luminescent zoanthid
  Epizoanthus leptoderma Cutress and Pequegnat, 1960 -- valid -- elongate zoanthid, elongate zoanthid
  Epizoanthus paguriphilus Verrill, 1882 -- valid -- hermit crab zoanthid
  Epizoanthus scotinus Wood, 1958 -- valid -- orange zoanthid, orange zoanthid
  Erenna richardi Bedot, 1904 -- valid
  Errinopora nanneca Fisher, 1938 -- valid
  Errinopora pourtalesi (Dall, 1885) -- invalid
  Erythropodium caribaeorum (Duchassaing and Michelotti, 1860) -- valid -- encrusting gorgonian
  Eucheilota bakeri (Torrey, 1909) -- valid
  Eucheilota duodecimalis A. Agassiz, 1862 -- valid
  Eucheilota pardoxica Mayer, 1900 -- invalid
  Eucheilota ventricularis McCrady, 1859 -- valid
  Eucheilotidae -- valid
  Eudendriidae -- valid
  Eudendrium album Nutting, 1896 -- valid -- white stickhydroid, white stickhydroid
  Eudendrium annulatum Norman, 1864 -- invalid -- annulate stickyhydroid
  Eudendrium arbuscula Wright, 1859 -- valid
  Eudendrium arbusculum Wright, 1859 -- invalid
  Eudendrium attenuatum Allman, 1877 -- valid
  Eudendrium breve Fraser, 1938 -- valid
  Eudendrium californicum Torrey, 1902 -- valid -- California stickhydroid, california stickyhydroid
  Eudendrium capillare Alder, 1856 -- valid
  Eudendrium carneum Clarke, 1882 -- valid -- red stickhydroid, red stickhydroid
  Eudendrium certicaule Fraser, 1938 -- valid
  Eudendrium cingulatum Stimpson, 1854 -- valid
  Eudendrium cochleatum Allman, 1877 -- valid
  Eudendrium dispar L. Agassiz, 1862 -- valid
  Eudendrium exiguum Allman, 1877 -- valid
  Eudendrium eximium Allman, 1877 -- valid
  Eudendrium gracile Allman, 1877 -- valid
  Eudendrium hargitti Congdon, 1906 -- invalid
  Eudendrium insigne Hincks, 1861 -- valid
  Eudendrium irregulare Fraser, 1922 -- valid
  Eudendrium laxum Allman, 1877 -- valid
  Eudendrium rameum (Pallas, 1766) -- valid
  Eudendrium ramosum (Linnaeus, 1758) -- valid -- stickhydroid, stickyhydroid
  Eudendrium rugosum Fraser, 1940 -- valid
  Eudendrium tenellum Allman, 1877 -- invalid
  Eudendrium tenue A. Agassiz, 1865 -- invalid -- slender stickhydroid
  Eudendrium vaginatum Allman, 1863 -- valid
  Eudoxoides mitra (Huxley, 1859) -- valid
  Eudoxoides spiralis (H. B. Bigelow, 1911) -- valid
  Eugorgia ampla (Verrill, 1864) -- valid
  Eugorgia forreri Studer, 1883 -- valid
  Eugorgia nobilis Verrill, 1868 -- valid
  Eugorgia rubens Verrill, 1868 -- valid
  Eumedusa birulai (Linko, 1913) -- valid
  Eunicea asperula Milne Edwards and Haime, 1857 -- valid -- knobby candelabra
  Eunicea calyculata (Ellis and Solander, 1786) -- valid -- warty eunicea, warty sea rod
  Eunicea fusca Duchassaing and Michelotti, 1860 -- valid -- doughnut sea rod
  Eunicea knighti Bayer, 1961 -- valid
  Eunicea laciniata Duchassaing and Michelotti, 1860 -- valid
  Eunicea mammosa Lamouroux, 1816 -- valid -- mammillated eunicea, swollen-knob candelabrum
  Eunicea palmeri Bayer, 1961 -- valid -- palmer's eunicea
  Eunicea succinea (Pallas, 1766) -- valid -- shelf-knob sea rod
  Eunicea tourneforti Milne Edwards and Haime, 1857 -- valid -- tournefort's knobby candelabra
  Euphysa aurata Forbes, 1848 -- valid
  Euphysa farcta (Miles, 1937) -- valid
  Euphysa flammea (Linko, 1905) -- valid
  Euphysa japonica (Maas, 1909) -- valid
  Euphysa peregrina (Murbach, 1899) -- valid
  Euphysa ruthae Norenburg and Morse, 1983 -- valid
  Euphysa tentaculata Linko, 1905 -- valid
  Euphysa vervoorti Brinckmann-Voss and Arai, 1998 -- valid
  Euphysilla peterseni Allwein, 1967 -- valid
  Euphysora bigelowi Maas, 1905 -- invalid
  Euplexaura marki Kükenthal, 1913 -- invalid
  Eutiara mayeri Bigelow, 1918 -- valid
  Eutima coerulea (L. Agassiz, 1862) -- valid
  Eutima cuculata Brooks, 1883 -- valid
  Eutima gegenbauri (Haeckel, 1864) -- valid
  Eutima mira McCrady, 1859 -- valid
  Eutima suzannae Allwein, 1967 -- valid
  Eutima variabilis McCrady, 1859 -- valid
  Eutimalphes brownei Torrey, 1909 -- valid
  Eutonina indicans (Romanes, 1876) -- valid
  Fanellia compressa (Verrill, 1865) -- valid
  Fanellia fraseri (Hickson, 1915) -- valid
  Filellum serpens (Hassall, 1848) -- valid
  Filellum serratum (Clarke, 1879) -- valid
  Foersteria purpurea (Foerster, 1923) -- valid
  Forskalia edwardsi Kölliker, 1853 -- valid
  Forskalia tholoides Haeckel, 1888 -- valid
  Forskaliidae -- valid
  Fraseroscyphus sinuosus Boero and Bouillon, 1993 -- valid
  Frillagalma vityazi Daniel, 1966 -- valid
  Funiculina quadrangularis (Pallas, 1766) -- valid
  Funiculinidae -- valid
  Garveia annulata Nutting, 1901 -- valid -- orange hydroid, orange hydroid
  Garveia brevis (Fraser, 1918) -- valid
  Garveia franciscana (Torrey, 1902) -- valid
  Garveia gracilis (Clark, 1876) -- valid
  Garveia groenlandica Levinsen, 1893 -- invalid
  Garveia nutans Wright, 1859 -- valid
  Garveia pusilla (Fraser, 1925) -- valid
  Garveia robusta (Torrey, 1902) -- valid
  Garveia tenella (Fraser, 1925) -- valid
  Geomackiea zephyrolata Mills, 1985 -- valid
  Gersemia rubiformis (Ehrenberg, 1834) -- valid -- sea strawberry
  Geryonia proboscidalis (Forskål, 1775) -- valid
  Geryoniidae Eschscholtz, 1829 -- valid
  Gilia reticulata (Totton, 1954) -- valid
  Gonionemus vertens L. Agassiz, 1862 -- valid -- clinging jellyfish, clinging jellyfish
  Gonothyraea clarki Torrey, 1902 -- invalid
  Gonothyraea loveni (Allman, 1859) -- valid
  Gorgonacea Lamouroux, 1816 -- invalid -- évantails de mer, gorgones, gorgonians, sea fans, sea feathers
  Gorgonia flabellum Linnaeus, 1758 -- valid -- Venus sea fan, venus sea fan
  Gorgonia ventalina Linnaeus, 1758 -- valid -- common sea fan, common sea fan
  Gorgoniidae Lamouroux, 1812 -- valid
  Gossea brachymera H. B. Bigelow, 1909 -- valid
  Grammaria abietina (M. Sars, 1850) -- valid
  Grammaria gracilis Stimpson, 1854 -- valid
  Grammaria immersa Nutting, 1901 -- valid
  Gymnangium sinuosum (Fraser, 1925) -- valid
  Gymnangium speciosum (Allman, 1877) -- valid
  Halammohydra schulzei Remane, 1927 -- valid
  Halammohydridae Remane, 1927 -- valid
  Haleciidae -- valid
  Halecium annulatum Torrey, 1902 -- valid
  Halecium articulosum Clark, 1875 -- valid
  Halecium beanii (Johnston, 1838) -- valid
  Halecium bermudense Congdon, 1907 -- valid
  Halecium capillare (Pourtalès, 1869) -- valid
  Halecium corrugatum Nutting, 1899 -- valid
  Halecium curvicaule von Lorenz, 1886 -- valid
  Halecium delicatulum Coughtrey, 1876 -- valid
  Halecium densum Calkins, 1899 -- valid
  Halecium diminutivum Fraser, 1940 -- valid
  Halecium flexile Allman, 1888 -- invalid
  Halecium fruticosum Fraser, 1943 -- valid
  Halecium gracile Verrill, 1874 -- invalid
  Halecium groenlandicum Kramp, 1911 -- valid
  Halecium halecinum (Linnaeus, 1758) -- valid -- herringbone hydroid
  Halecium insolens Fraser, 1938 -- valid
  Halecium kofoidi Torrey, 1902 -- valid
  Halecium labrosum Alder, 1859 -- valid
  Halecium macrocephalum Allman, 1877 -- valid
  Halecium minutum Broch, 1903 -- valid
  Halecium muricatum (Ellis and Solander, 1786) -- valid -- sea hedgehog hydroid
  Halecium nanum Alder, 1859 -- valid
  Halecium ornatum Nutting, 1901 -- valid
  Halecium parvulum Bale, 1888 -- invalid
  Halecium paucinodum (Fraser, 1947) -- valid
  Halecium pygmaeum Fraser, 1911 -- valid
  Halecium reversum Nutting, 1901 -- valid
  Halecium robustum Verrill, 1873 -- invalid
  Halecium scutum Clark, 1877 -- valid
  Halecium sessile Norman, 1867 -- valid
  Halecium speciosum Nutting, 1901 -- valid
  Halecium telescopicum Allman, 1888 -- valid
  Halecium tenellum Hincks, 1861 -- valid
  Halecium undulatum Billard, 1921 -- valid
  Halecium vagans Fraser, 1938 -- valid
  Halecium washingtoni Nutting, 1901 -- valid
  Halecium wilsoni Calkins, 1899 -- valid
  Haliclystus auricula (Rathke, 1806) -- valid
  Haliclystus octoradiatus (Lamarck, 1816) -- valid
  Haliclystus salpinx Clark, 1863 -- valid
  Haliclystus stejnegeri Kishinouye, 1899 -- valid
  Halicreas minimum Fewkes, 1882 -- valid
  Halicreatidae Fewkes, 1886 -- valid
  Halimedusa typus Bigelow, 1916 -- valid
  Halimedusidae Arai and Brinckmann-Voss, 1980 -- valid
  Halipteris christii (Koren and Danielssen, 1847) -- valid
  Halipteris finmarchica (Sars, 1851) -- valid
  Haliscera bigelowi Kramp, 1947 -- valid
  Haliscera conica Vanhöffen, 1902 -- valid
  Haliscera racovitzae (Maas, 1906) -- valid
  Halistemma amphytridis (Lesueur and Petit, 1807) -- valid
  Halistemma cupulifera Lens and van Riemsdijk, 1908 -- valid
  Halistemma rubrum (Vogt, 1852) -- valid
  Halistemma striata Totton, 1965 -- valid
  Halistemma transliratum Pugh and Youngbluth, 1988 -- valid
  Halitholus cirratus Hartlaub, 1913 -- valid
  Halitholus pauper Hartlaub, 1913 -- valid
  Halitiara formosa Fewkes, 1882 -- valid
  Halitrephes maasi H. B. Bigelow, 1909 -- valid
  Halitrephes valdiviae Vanhöffen, 1912 -- valid
  Halopsis ocellata (A. Agassiz, 1863) -- valid
  Halopterididae -- valid
  Halopteris alternata (Nutting, 1900) -- valid
  Halopteris carinata Allman, 1877 -- valid
  Halopteris catharina (Johnston, 1833) -- valid
  Halopteris clarkei (Nutting, 1900) -- valid
  Halopteris diaphana (Heller, 1868) -- valid
  Halopteris geminata (Allman, 1877) -- valid
  Halopteris tenella (Verrill, 1874) -- valid
  Hartlaubella gelatinosa (Pallas, 1766) -- valid
  Hataia parva Hirai and Yamada, 1965 -- valid
  Hebella corrugata (Fraser, 1938) -- invalid
  Hebella venusta (Allman, 1877) -- valid
  Hebellopsis cylindrica (von Lendenfeld, 1885) -- valid
  Hebellopsis expansa (Fraser, 1938) -- valid
  Hebellopsis scandens (Bale, 1888) -- valid
  Helgicirrha weaveri Allwein, 1967 -- valid
  Heteropyramis maculata Moser, 1925 -- valid
  Heterotiara annonyma Maas, 1905 -- invalid
  Hexacorallia -- valid
  Hincksella cylindrica (Bale, 1888) -- valid
  Hincksella projecta (Fraser, 1938) -- valid
  Hippopodiidae -- valid
  Hippopodius hippopus (Forskål, 1776) -- valid
  Hippurella annulata Allman, 1877 -- valid
  Holaxonia Studer, 1887 -- valid
  Homoeonema platygonon Browne, 1903 -- valid
  Hybocodon pendulus (L. Agassiz, 1862) -- invalid -- one armed jellyfish, one-arm jelllyfish
  Hybocodon prolifer L. Agassiz, 1862 -- valid
  Hydra americana Hyman, 1929 -- valid -- white hydra
  Hydra canadensis Rowan, 1930 -- valid -- Alberta hydra
  Hydra carnea L. Agassiz, 1850 -- valid
  Hydra cauliculata Hyman, 1938 -- valid
  Hydra hymanae Hadley and Forrest, 1949 -- valid -- Jersey hydra
  Hydra littoralis Hyman, 1931 -- valid -- swiftwater hydra
  Hydra minima Forrest, 1963 -- valid
  Hydra oligactis Pallas, 1766 -- valid -- brown hydra
  Hydra oregona Griffin and Peters, 1939 -- valid -- Oregon hydra
  Hydra pseudoligactis (Hyman, 1931) -- valid -- false brown hydra
  Hydra rutgersensis Forrest, 1963 -- valid
  Hydra utahensis Hyman, 1931 -- valid -- Utah hydra
  Hydractinia aggregata Fraser, 1911 -- valid
  Hydractinia americana (Edwards, 1972) -- valid
  Hydractinia arge (Clarke, 1882) -- valid
  Hydractinia armata Fraser, 1940 -- valid
  Hydractinia californica Torrey, 1904 -- valid
  Hydractinia carica Bergh, 1887 -- valid
  Hydractinia carnea (M. Sars, 1846) -- valid
  Hydractinia carolinae Fraser, 1912 -- valid
  Hydractinia dubia (Mayer, 1900) -- valid
  Hydractinia echinata (Fleming, 1828) -- valid -- snailfur, snailfur
  Hydractinia hooperi (Sigerfoos, 1899) -- invalid
  Hydractinia hooperii (Sigerfoos, 1899) -- valid
  Hydractinia laevispina Fraser, 1922 -- valid
  Hydractinia milleri Torrey, 1902 -- valid -- Miller hydractinia, miller hydractinia
  Hydractinia minima (Trinci, 1903) -- valid
  Hydractinia minuta (Mayer, 1900) -- valid
  Hydractinia monocarpa Allman, 1874 -- valid
  Hydractinia polycarpa Fraser, 1938 -- valid
  Hydractinia polyclina L. Agassiz, 1862 -- valid
  Hydractinia selena (Mills, 1976) -- valid
  Hydractinia symbiolongicarpus Buss and Yund, 1989 -- valid
  Hydractinia symbiopollicaris Buss and Yund, 1989 -- valid
  Hydractinia valens Fraser, 1941 -- valid
  Hydractiniidae L. Agassiz, 1862 -- valid
  Hydrallmania distans Nutting, 1899 -- valid
  Hydrallmania falcata (Linnaeus, 1758) -- valid -- sickle hydroid, sickle hydroid
  Hydrallmania franciscana (Trask, 1857) -- valid
  Hydrichthys mirus Fewkes, 1887 -- valid
  Hydridae -- valid
  Hydrocoryne bodegensis J. T. Rees, Hand and Mills, 1976 -- valid
  Hydrocorynidae Rees, 1957 -- valid
  Hydrodendron alternatum (Fraser, 1938) -- valid
  Hydrodendron carchesium (Fraser, 1914) -- valid
  Hydrodendron corrugatum (Fraser, 1936) -- valid
  Hydrodendron expansum (Fraser, 1948) -- valid
  Hydrodendron gracile (Fraser, 1914) -- valid
  Hydrodendron mirabile (Hincks, 1866) -- valid
  Hydrozoa Owen, 1843 -- valid -- água viva, hidra, hidrozoa, hidrozoário, hydraires, hydralike animals, hydroids, hydrozoaires, hydrozoans, pólipo
  Hypnogorgia pendula Duchassaing and Michelotti, 1864 -- valid
  Hypolytus Murbach, 1899 -- invalid
  Hypolytus peregrinus Murbach, 1899 -- invalid
  Ichthyocodium sarcotretis Jungersen, 1912 -- valid
  Iciligorgia schrammi Duchassaing, 1870 -- valid -- black sea fan, deep-water sea fan, deepwater sea fan
  Idiellana pristis (Lamouroux, 1816) -- valid
  Isididae Lamouroux, 1812 -- valid
  Isodactylactis borealis Widersten, 1998 -- valid
  Janaria mirabilis Stechow, 1921 -- valid
  Keratosum maximum (Levinsen, 1893) -- valid
  Keroeididae Kinoshita, 1910 -- valid
  Kirchenpaueria paucinema (Fraser, 1940) -- valid
  Kirchenpaueria plumularioides (Clark, 1877) -- valid
  Kirchenpaueriidae -- valid
  Koellikerina elegans (Mayer, 1900) -- valid
  Kophobelemnidae -- valid
  Kophobelemnon stelliferum (Müller, 1776) -- valid
  Kyopoda lamberti Larson, 1988 -- valid
  Kyopodidae -- invalid
  Kyopodiidae Larson, 1988 -- valid
  Lafoea adhaerens Nutting, 1901 -- valid
  Lafoea adnata Fraser, 1925 -- valid
  Lafoea coalescens Allman, 1877 -- valid
  Lafoea dumosa (Fleming, 1820) -- valid
  Lafoea fruticosa (M. Sars, 1850) -- valid
  Lafoea gracillima (Alder, 1856) -- valid
  Lafoea symmetrica Bonnevie, 1899 -- invalid
  Lafoea tenellula Allman, 1877 -- valid
  Lafoeidae -- valid
  Laodicea brevigona Allwein, 1967 -- valid
  Laodicea neptuna Mayer, 1900 -- valid
  Laodicea undulata (Forbes and Goodsir, 1853) -- valid
  Laodiceidae -- valid
  Laomedea altitheca (Fraser, 1948) -- valid
  Laomedea amphora L. Agassiz, 1862 -- valid
  Laomedea calceolifera (Hincks, 1871) -- valid
  Laomedea clarkii Marktanner-Turneretscher, 1895 -- invalid
  Laomedea exigua M. Sars, 1857 -- valid
  Laomedea flexuosa Alder, 1857 -- valid
  Laomedea inornata (Nutting, 1901) -- valid
  Laomedea neglecta Alder, 1856 -- valid
  Larsonia pterophylla (Haeckel, 1879) -- valid
  Leiopathes glaberrima (Esper, 1788) -- valid -- smooth black coral, smooth black coral
  Leiopathidae -- valid
  Lensia achilles Totton, 1941 -- valid
  Lensia ajax Totton, 1941 -- valid
  Lensia baryi Totton, 1965 -- valid
  Lensia campanella (Moser, 1925) -- valid
  Lensia challengeri Totton, 1954 -- valid
  Lensia conoidea (Keferstein and Ehlers, 1860) -- valid
  Lensia cossack Totton, 1941 -- valid
  Lensia exeter Totton, 1941 -- valid
  Lensia fowleri (H. B. Bigelow, 1911) -- valid
  Lensia grimaldi (Leloup, 1933) -- valid
  Lensia havock Totton, 1941 -- valid
  Lensia hostile Totton, 1941 -- valid
  Lensia hotspur Totton, 1941 -- valid
  Lensia lelouveteau Totton, 1941 -- valid
  Lensia meteori (Leloup, 1934) -- valid
  Lensia multicristata (Moser, 1925) -- valid
  Lensia reticulata Totton, 1954 -- invalid
  Lensia subtilis (Chun, 1886) -- valid
  Lensia subtiloides (Lens and van Riemsdijk, 1908) -- valid
  Leptogorgia californica Verrill, 1868 -- valid
  Leptogorgia cardinalis (Bayer, 1961) -- valid
  Leptogorgia caryi Verrill, 1868 -- valid
  Leptogorgia chilensis Verrill, 1868 -- valid
  Leptogorgia euryale (Bayer, 1952) -- valid
  Leptogorgia hebes Verrill, 1869 -- valid -- regal sea fan
  Leptogorgia medusa (Bayer, 1952) -- valid
  Leptogorgia miniata (Milne-Edwards and Haime, 1857) -- valid -- carmine sea spray
  Leptogorgia punicea (Milne Edwards and Haime, 1857) -- valid
  Leptogorgia setacea (Pallas, 1766) -- valid
  Leptogorgia stheno (Bayer, 1952) -- valid
  Leptogorgia virgulata (Lamarck, 1815) -- valid -- colorful sea whip
  Leptolida -- invalid
  Leptomedusae Haeckel, 1866 -- invalid -- thecate hydroids
  Leptothecatae -- valid -- hydromedusae, thecate hydroids
  Leuckartiara nobilis Hartlaub, 1913 -- valid
  Leuckartiara octona (Fleming, 1823) -- valid
  Leuckartiara zacae Bigelow, 1940 -- valid
  Lilyopsis rosea Chun, 1885 -- valid
  Limnomedusae Kramp, 1938 -- valid
  Linuche unguiculata (Swartz, 1788) -- valid -- thimble jellyfish, thimble jellyfish
  Linuchidae -- valid
  Liriope tetraphylla (Chamisso and Eysenhardt, 1821) -- valid
  Lizzia blondina Forbes, 1848 -- valid
  Lizzia fulgurans (A. Agassiz, 1865) -- valid
  Lizzia gracilis (Mayer, 1900) -- valid
  Lophogorgia cardinalis Bayer, 1961 -- invalid
  Lophogorgia hebes (Verrill, 1869) -- invalid
  Lophogorgia puniacea (Milne Edwards and Haime, 1857) -- invalid -- sea whip
  Lovenella bermudensis (Fewkes, 1883) -- valid
  Lovenella gracilis (Clarke, 1882) -- valid
  Lovenella grandis Nutting, 1901 -- valid
  Lovenella nodosa Fraser, 1938 -- valid
  Lovenella producta (G. O. Sars, 1874) -- valid
  Lovenella rugosa Fraser, 1948 -- valid
  Lovenellidae -- valid
  Lucernaria quadricornis O. F. Müller, 1776 -- valid
  Lucernariidae -- valid
  Lychnagalma utricularia (Claus, 1879) -- valid
  Lytocarpia bispinosa (Allman, 1877) -- valid
  Lytocarpia myriophyllum (Linnaeus, 1758) -- valid -- pheasant-tail hydroid, phesant-tail hydroid
  Lytreia plana (Deichmann, 1936) -- valid
  Macrorhynchia allmani (Nutting, 1900) -- valid
  Macrorhynchia mercatoris Leloup, 1937 -- invalid
  Macrorhynchia philippina Kirchenpauer, 1872 -- valid -- stinging hydroid, white stinger
  Maeotias inexpectata Ostroumov, 1896 -- invalid
  Maeotias marginata (Modeer, 1791) -- valid
  Malagazzia carolinae (Mayer, 1900) -- valid
  Malagazziidae Bouillon, 1984 -- valid
  Manania atlantica (Berrill, 1962) -- valid
  Manania auricula (Fabricius, 1780) -- valid
  Manania distincta (Kishinouye, 1910) -- valid
  Manania gwilliami Larson and Fautin, 1989 -- valid
  Manania handi Larson and Fautin, 1989 -- valid
  Maresearsia praeclara Totton, 1954 -- valid
  Margelopsidae Uchida, 1927 -- valid
  Margelopsis gibbesi (McCrady, 1859) -- invalid
  Margelopsis gibbesii (McCrady, 1859) -- valid
  Marrus orthocanna (Kramp, 1942) -- valid
  Mastigiidae -- valid
  Melicertidae -- valid
  Melicertissa mayeri Kramp, 1959 -- valid
  Melicertum octocostatum (M. Sars, 1835) -- valid
  Merga reesi Russell, 1956 -- valid
  Merga violacea (Agassiz and Mayer, 1899) -- valid
  Merona cornucopiae (Norman, 1864) -- valid
  Merona laxa (Fraser, 1938) -- valid
  Millepora alcicornis Linnaeus, 1758 -- valid -- fire coral, fire coral
  Millepora complanata Lamarck, 1816 -- valid -- bladed fire coral, bladed fire coral
  Milleporidae Fleming, 1828 -- valid -- fire corals
  Mistoprayina fragosa Pugh and Harbison, 1987 -- valid
  Mitrocoma cellularia (A. Agassiz, 1865) -- valid -- cross jellyfish
  Mitrocoma discoidea Torrey, 1909 -- valid
  Mitrocomella cruciata (A. Agassiz, 1865) -- valid
  Mitrocomella polydiademata (Romanes, 1876) -- valid
  Mitrocomella sinuosa (Foerster, 1923) -- valid
  Mitrocomidae -- valid
  Mitrocomium medusiferum Torrey, 1902 -- valid
  Modeeria rotunda (Quoy and Gaimard, 1827) -- valid
  Moerisia lyonsi Boulenger, 1908 -- valid
  Moerisiidae Poche, 1914 -- valid
  Monobrachiidae -- valid
  Monobrachium parasitum Mereschkowsky, 1877 -- valid
  Monocoryne gigantea (Bonnevie, 1898) -- valid
  Monostaechas quadridens (McCrady, 1859) -- valid
  Monotheca margaretta Nutting, 1900 -- valid
  Muggiaea atlantica Cunningham, 1892 -- valid
  Muggiaea bargmannae Totton, 1954 -- valid
  Muggiaea kochi (Will, 1844) -- valid
  Muricea atlantica (Riess in Kükenthal, 1919) -- valid
  Muricea californica Aurivillius, 1931 -- valid
  Muricea elongata Lamouroux, 1821 -- valid -- orange spiny sea rod
  Muricea fruticosa Verrill, 1869 -- valid
  Muricea laxa Verrill, 1864 -- valid -- delicate spiny sea rod
  Muricea muricata (Pallas, 1766) -- valid -- spiny sea fan
  Muricea pendula Verrill, 1864 -- valid -- pinnate spiny sea fan
  Muriceides hirtus (Pourtalès, 1868) -- valid
  Muriceopsis flavida (Lamarck, 1815) -- valid -- bottle-brush coral, rough sea plume
  Muriceopsis petila Bayer, 1961 -- valid
  Myrionema amboinense Pictet, 1893 -- valid
  Myriothelidae Hincks, 1868 -- invalid
  Nanomia bijuga (delle Chiaje, 1841) -- valid
  Nanomia cara A. Agassiz, 1865 -- valid
  Narcomedusae Haeckel, 1879 -- valid
  Nausithoe atlantica Broch, 1914 -- valid
  Nausithoe punctata Kölliker, 1853 -- valid
  Nausithoe rubra Vanhöffen, 1902 -- valid
  Nausithoidae -- valid
  Nectadamas diomedeae (H. B. Bigelow, 1911) -- valid
  Nectopyramis diomedeae H. B. Bigelow, 1911 -- invalid
  Nectopyramis natans (H. B. Bigelow, 1911) -- valid
  Nectopyramis thetis H. B. Bigelow, 1911 -- valid
  Nemeresia pinnata (Nutting, 1900) -- invalid
  Nemertesia americana (Nutting, 1900) -- valid
  Nemertesia antennina (Linnaeus, 1758) -- valid -- sea beard, sea beard
  Nemertesia irregularis (Fraser, 1938) -- invalid
  Nemertesia polynema (Fraser, 1948) -- valid
  Nemertesia rugosa (Nutting, 1900) -- valid
  Nemertesia simplex (Allman, 1877) -- valid
  Nemertesia tetraseriata (Fraser, 1938) -- valid
  Nemertesia verticillata (Fraser, 1925) -- valid
  Nemopsis bachei L. Agassiz, 1849 -- valid
  Neoturris breviconis (Murbach and Shearer, 1902) -- valid
  Neoturris fontata (Bigelow, 1909) -- valid
  Netocertoides brachiatus Mayer, 1900 -- valid
  Nicella goreaui Bayer, 1973 -- valid -- orange deep water fan
  Nicella guadalupensis (Duchassaing and Michelotti, 1860) -- valid
  Nidalia occidentalis Gray, 1835 -- valid
  Nidaliidae -- valid
  Niobia dendrotentacula Mayer, 1900 -- valid
  Nuditheca dalli (Clark, 1877) -- invalid
  Nuditheca dallii (Clark, 1877) -- valid
  Obelia articulata (A. Agassiz, 1865) -- invalid
  Obelia bicuspidata Clark, 1875 -- invalid
  Obelia bidentata Clark, 1875 -- valid -- doubletoothed hydroid, doubletoothed hydroid
  Obelia borealis Nutting, 1901 -- invalid
  Obelia commissuralis McCrady, 1859 -- invalid
  Obelia corona Torrey, 1904 -- invalid
  Obelia dichotoma (Linnaeus, 1758) -- valid -- sea thread hydroid, sea thread hydroid
  Obelia flabellata (Hincks, 1866) -- invalid
  Obelia geniculata (Linnaeus, 1758) -- valid -- knotted thread hydroid, knotted thread hydroid
  Obelia gracilis Calkins, 1899 -- invalid
  Obelia hyalina Clarke, 1879 -- invalid
  Obelia longissima (Pallas, 1766) -- valid
  Obelia multidentata Fraser, 1914 -- valid
  Obelia plicata Hincks, 1868 -- valid
  Obelia racemosa Fraser, 1941 -- valid
  Obelia surcularis Calkins, 1899 -- invalid
  Oceania armata Kölliker, 1853 -- valid
  Olindias tenuis (Fewkes, 1882) -- valid
  Olindiidae Haeckel, 1879 -- valid
  Opercularella lacerata (Johnston, 1847) -- valid
  Opercularella pumila Clark, 1875 -- valid
  Opercularella rugosa (Nutting, 1901) -- valid
  Orchistoma pileus (Lesson, 1843) -- valid
  Orchistomatidae Bouillon, 1984 -- valid
  Orchistomella tentaculata (Mayer, 1900) -- valid
  Orthopyxis compressa (Clark, 1877) -- valid
  Orthopyxis everta (Clark, 1876) -- valid
  Orthopyxis integra (MacGillivray, 1842) -- valid
  Orthopyxis minor (Fraser, 1938) -- valid
  Orthopyxis sargassicola (Nutting, 1915) -- valid
  Pachycerianthus aestuarii (Torrey and Kleeburger, 1909) -- valid
  Pachycerianthus fimbriatus McMurrich, 1910 -- valid
  Pachycerianthus johnsoni (Torrey and Kleeburger, 1909) -- valid
  Pacifigorgia pulchra (Verrill, 1870) -- valid
  Palythoa mammillosa (Ellis and Solander, 1786) -- valid -- knobby zoanthid, knobby zoanthidean
  Palythoa nigricans McMurrich, 1898 -- valid
  Palythoa texaensis Carlgren and Hedgepth, 1952 -- valid
  Pandea rubra Bigelow, 1913 -- valid
  Pandeidae Haeckel, 1879 -- valid
  Pantachogon haeckeli Maas, 1893 -- valid
  Paragorgia arborea (Linnaeus, 1758) -- valid -- bubble gum coral
  Paragorgiidae -- valid
  Paragotoea bathybia Kramp, 1942 -- valid
  Paragotoeidae -- valid
  Paramuricea grandis Verrill, 1883 -- valid
  Paramuricea placomus (Linnaeus, 1758) -- valid
  Parantipathes tetrasticha (Pourtalès, 1868) -- valid
  Paraphyllina intermedia Mass, 1903 -- valid
  Paraphyllina ransoni Russell, 1956 -- valid
  Paraphyllinidae -- valid
  Parazoanthidae -- valid
  Parazoanthus lucificum Cutress and Pequegnat, 1960 -- valid -- luminescent parazoanthid, luminescent parazoanthid
  Paulinum lineatum Brinckmann-Voss and Arai, 1998 -- valid
  Pegantha clara H. B. Bigelow, 1909 -- valid
  Pegantha laevis H. B. Bigelow, 1909 -- valid
  Pegantha martagon Haeckel, 1879 -- valid
  Pelagia colorata Russell, 1964 -- valid -- purple-striped jelly
  Pelagia noctiluca (Forskål, 1775) -- valid -- purplestriped jelly
  Pelagiidae Gegenbaur, 1856 -- valid
  Pennaria disticha Goldfuss, 1820 -- valid -- feather hydroid
  Pennariidae McCrady, 1859 -- valid
  Pennatula aculeata Danielssen, 1860 -- valid
  Pennatula borealis M. Sars, 1846 -- valid
  Pennatula phosphorea Linnaeus, 1758 -- valid
  Pennatulacea Verrill, 1865 -- valid -- sea panzies, sea pens, sea pens
  Pennatulidae Ehrenberg, 1828 -- valid
  Pericladium mirabilis (Verrill, 1873) -- valid
  Pericladium trilateralis (Fraser, 1936) -- valid
  Perigonimus jonesii Osborn and Hargitt, 1894 -- invalid
  Perigonimus pugetensis Heath, 1910 -- invalid
  Perigonimus repens (Wright, 1857) -- invalid
  Perigonimus serpens Allman, 1863 -- invalid
  Perigonimus sessilis (Wright, 1857) -- invalid
  Periphylla periphylla (Péron and Lesueur, 1809) -- valid
  Periphyllidae -- valid
  Periphyllopsis braueri Vanhöffen, 1902 -- valid
  Periphyllopsis galathea Kramp, 1959 -- invalid
  Persa incolorata McCrady, 1859 -- valid
  Phacellophora camtschatica Brandt, 1838 -- valid -- egg yolk jelly, eggyolk jelly, fried egg jellyfish
  Phialella fragilis (Uchida, 1938) -- valid
  Phialella parvigastra (Mayer, 1900) -- valid
  Phialella zappai Boero, 1987 -- valid
  Phialellidae -- valid
  Phialopsis diegensis Torrey, 1909 -- valid
  Phyllorhiza punctata von Lendenfeld, 1884 -- valid -- Australian spotted jellyfish
  Physalia physalis (Linnaeus, 1758) -- valid -- Portuguese man o' war
  Physaliidae Brandt, 1835 -- valid
  Physonectae -- valid
  Physophora hydrostatica Forskål, 1775 -- valid
  Physophoridae -- valid
  Placogorgia mirabilis Deichmann, 1936 -- valid
  Placogorgia tenuis (Verrill, 1883) -- valid
  Plexaura flexuosa Lamouroux, 1821 -- valid -- bent sea rod
  Plexaura homomalla (Esper, 1792) -- valid -- black sea rod, black sea rod, common bushy soft coral
  Plexaurella dichotoma (Esper, 1791) -- valid -- double-forked plexaurella, slit-pore sea rod
  Plexaurella fusifera Kunze, 1916 -- valid -- sea rod
  Plexaurella grisea Kunze, 1916 -- valid -- gray plexaurella
  Plexaurella nutans (Duchassaing and Michelotti, 1860) -- valid -- giant slit-pore sea rod
  Plexauridae Gray, 1859 -- valid
  Pliobothrus symmetricus Pourtalès, 1868 -- valid
  Plotocnide borealis Wagner, 1885 -- valid
  Plumarella pourtalesii (Verrill, 1883) -- valid
  Plumularia alicia Torrey, 1902 -- invalid
  Plumularia attenuata Allman, 1877 -- valid
  Plumularia constricta (Fraser, 1948) -- valid
  Plumularia corrugata Nutting, 1900 -- invalid
  Plumularia exilis Fraser, 1948 -- valid
  Plumularia filicula Allman, 1877 -- valid
  Plumularia floridana Nutting, 1900 -- valid
  Plumularia goodei Nutting, 1900 -- valid
  Plumularia gracilis (Fraser, 1948) -- valid
  Plumularia gracillima G. O. Sars, 1873 -- valid
  Plumularia inermis Nutting, 1900 -- invalid
  Plumularia insolens Fraser, 1948 -- valid
  Plumularia integra Fraser, 1948 -- valid
  Plumularia inverta (Fraser, 1948) -- valid
  Plumularia irregularis Fraser, 1948 -- valid
  Plumularia lagenifera Allman, 1885 -- valid
  Plumularia margaretta (Nutting, 1900) -- invalid
  Plumularia megalocephala Allman, 1877 -- valid
  Plumularia meganema Fraser, 1948 -- valid
  Plumularia mobilis Fraser, 1948 -- valid
  Plumularia multiramosa Fraser, 1948 -- valid
  Plumularia parva Fraser, 1948 -- valid
  Plumularia plumularioides (Clark, 1877) -- invalid
  Plumularia reversa Fraser, 1948 -- valid
  Plumularia septata Fraser, 1938 -- valid
  Plumularia setacea (Linnaeus, 1758) -- valid -- little seabristle, little seabristle
  Plumularia sinuosa Fraser, 1938 -- valid
  Plumularia strictocarpa Pictet, 1893 -- valid
  Plumularia virginiae Nutting, 1900 -- valid
  Plumulariidae -- valid
  Podocoryna carnea M. Sars, 1846 -- invalid
  Podocoryna selena Mills, 1976 -- invalid
  Podocoryne carnea M. Sars, 1846 -- invalid -- smoothspined snailfur
  Podocoryne selena Mills, 1976 -- invalid
  Polyorchidae Agassiz, 1862 -- valid
  Polyorchis haplus Skogsberg, 1948 -- valid
  Polyorchis penicillatus (Eschscholtz, 1829) -- valid -- penicillate jellyfish, penicillate jellyfish
  Polypodiidae -- valid
  Polypodium hydriforme Ussov, 1885 -- valid
  Poralia rufescens Vanhöffen, 1902 -- valid
  Poraliinae -- valid
  Porpita porpita (Linnaeus, 1758) -- valid -- blue button, blue button
  Porpitidae Goldfuss, 1818 -- valid
  Praya dubia (Quoy and Gaimard, 1827) -- valid
  Praya reticulata (H. B. Bigelow, 1911) -- valid
  Prayidae -- valid
  Prayola urinatrix Pugh and Harbison, 1987 -- valid
  Primnoa resedaeformis (Gunnerus, 1763) -- valid -- red trees
  Primnoidae -- valid
  Proboscidactyla circumsabella Hand, 1954 -- valid
  Proboscidactyla flavicirrata Brandt, 1835 -- valid
  Proboscidactyla occidentalis (Fewkes, 1889) -- valid
  Proboscidactyla ornata (McCrady, 1857) -- valid
  Proboscidactylidae Hand and Hendrickson, 1950 -- valid
  Protiara haeckeli Hargitt, 1902 -- valid
  Protohydra leuckarti Greeff, 1870 -- valid
  Protohydridae -- valid
  Protoptilidae Kölliker, 1872 -- valid
  Protoptilum thomsoni Kölliker, 1872 -- valid
  Psammogorgia spauldingi Nutting, 1909 -- invalid
  Psammogorgia teres Verrill, 1868 -- valid
  Pseudodrifa nigra (Pourtalès, 1868) -- valid
  Pseudoplexaura flagellosa (Houttuyn, 1772) -- valid -- porous sea rod
  Pseudoplexaura porosa (Houttuyn, 1772) -- valid -- dry sea feather
  Pseudoplexaura wagenaari (Stiasny, 1941) -- valid
  Pseudopterogorgia acerosa (Pallas, 1766) -- valid -- purple sea plume, purple sea plume, smooth sea feather
  Pseudopterogorgia americana (Gmelin, 1791) -- valid -- slimy sea plume, slimy sea plume
  Pseudopterogorgia bipinnata (Verrill, 1864) -- valid -- bipinnate sea plume, forked sea feather
  Pseudopterogorgia elisabethae Bayer, 1961 -- valid -- sea plume
  Pseudopterogorgia kallos (Bielchowsky, 1918) -- valid
  Pseudopterogorgia rigida (Bielchowsky, 1929) -- valid
  Pterogorgia anceps (Pallas, 1766) -- valid -- angular sea whip, angular sea whip
  Pterogorgia citrina (Esper, 1792) -- valid -- yellow sea whip, yellow sea whip
  Pterogorgia guadalupensis Duchassaing and Michelin, 1846 -- valid -- grooved-blade sea whip
  Ptilosarcus gurneyi (Gray, 1860) -- valid
  Ptilosarcus undulatus (Verrill, 1865) -- valid
  Ptychogastria polaris Allman, 1878 -- valid
  Ptychogastriidae Mayer, 1910 -- valid
  Ptychogena californica Torrey, 1909 -- valid
  Ptychogena lactea A. Agassiz, 1865 -- valid
  Pycnotheca allmani (Torrey, 1904) -- valid
  Pyrostephidae -- valid
  Ramosia vitiazi Stepanjants, 1967 -- valid
  Rathkea octopunctata (M. Sars, 1835) -- valid
  Rathkeidae Russell, 1953 -- valid
  Renilla koellikeri Pfeffer, 1886 -- valid
  Renilla muelleri Kölliker, 1872 -- valid
  Renilla reniformis (Pallas, 1766) -- valid -- sea pansy
  Renillidae Gray, 1860 -- valid
  Rhacostoma atlanticum L. Agassiz, 1850 -- valid
  Rhizocaulus verticillatus (Linnaeus, 1758) -- valid -- horsetail hydroid, horsetail hydroid
  Rhizogeton ezoense Yamada, 1964 -- valid
  Rhizogeton fusiforme L. Agassiz, 1862 -- invalid
  Rhizogeton nematophorum Antsulevich, 1986 -- invalid
  Rhizogeton nudum Broch, 1909 -- invalid
  Rhizophysa eysenhardti Gegenbaur, 1859 -- valid
  Rhizophysa filiformis (Forskål, 1775) -- valid
  Rhizophysidae Brandt, 1835 -- valid
  Rhizorhagium formosum (Fewkes, 1889) -- valid
  Rhizorhagium roseum M. Sars, 1874 -- valid
  Rhizostomatidae Claus, 1883 -- valid
  Rhizostomeae -- valid
  Rhodaliidae -- valid
  Rhopalonema funerarium Vanhöffen, 1902 -- valid
  Rhopalonema velatum Gegenbaur, 1856 -- valid
  Rhopalonematidae Russell, 1953 -- valid
  Rhopilema verrilli (Fewkes, 1887) -- valid -- mushroom jellyfish
  Rhysia fletcheri Brinckmann-Voss, Lickey and Mills, 1993 -- valid
  Rhysiidae -- valid
  Ricordea florida Duchassaing and Michelotti, 1860 -- valid -- Florida corallimorpharian
  Riisea paniculata Duchassaing and Michelotti, 1860 -- valid
  Rosacea cymbiformis (delle Chiaje, 1822) -- valid
  Rosacea flaccida Biggs, Pugh and Carré, 1978 -- valid
  Rosacea limbata Pugh and Youngbluth, 1988 -- valid
  Rosacea plicata Quoy and Gaimard, 1827 -- valid
  Rosacea repanda Pugh and Youngbluth, 1988 -- valid
  Sagamihydra dyssymetra (Billard, 1929) -- valid
  Salacia alba (Fraser, 1911) -- invalid
  Salacia articulata (Pallas, 1766) -- invalid
  Salacia carica (Levisen, 1893) -- invalid
  Salacia desmoides (Torrey, 1902) -- invalid
  Salacia fraseri Calder, 1991 -- invalid
  Salacia laxa (Allman, 1874) -- invalid
  Sarsia apicula (Murbach and Shearer, 1902) -- valid
  Sarsia bella Brinckmann-Voss, 2000 -- valid
  Sarsia eximia (Allman, 1859) -- invalid
  Sarsia gemmifera Forbes, 1848 -- valid
  Sarsia hargitti Mayer, 1910 -- valid
  Sarsia lovenii (M. Sars, 1846) -- valid
  Sarsia occulta Edwards, 1978 -- valid
  Sarsia princeps (Haeckel, 1879) -- valid
  Sarsia tubulosa (M. Sars, 1835) -- valid -- clapper hydroid, clapper hydromedusa, clapper medusa
  Scandia corrugata Fraser, 1938 -- valid
  Scandia mutabilis (Ritchie, 1907) -- valid
  Schizotricha tenella (Verrill, 1874) -- invalid
  Scleracis guadalupensis (Duchassaing and Michelotti, 1860) -- valid
  Scleracis pumila Reiss, 1919 -- valid
  Scleraxonia Studer, 1887 -- valid
  Scrippsia pacifica Torrey, 1909 -- valid
  Scyphozoa Götte, 1887 -- valid -- água viva, Cifozoa, cifozoário, cup animals, jellyfish, jellyfishes, méduses, meduza
  Selaginopsis alternitheca (Levisen, 1893) -- invalid
  Selaginopsis cedrina (Linnaeus, 1758) -- valid
  Selaginopsis cylindrica (Clark, 1877) -- valid
  Selaginopsis hartlaubi (Nutting, 1904) -- valid
  Selaginopsis mirabilis (Verrill, 1873) -- invalid
  Selaginopsis obsoleta (Lepechin, 1778) -- valid
  Selaginopsis ornata Nutting, 1904 -- invalid
  Selaginopsis pinaster (Lepechin, 1783) -- valid
  Selaginopsis pinnata Mereschkowsky, 1878 -- invalid
  Selaginopsis trilateralis Fraser, 1936 -- invalid
  Selaginopsis triserialis Mereschkowsky, 1878 -- valid
  Semaeostomeae -- valid
  Sertularella albida Kirchenpauer, 1884 -- valid
  Sertularella areyi Nutting, 1904 -- valid
  Sertularella clarki Mereschkowsky, 1878 -- invalid
  Sertularella clarkii Mereschkowsky, 1878 -- valid
  Sertularella complexa Nutting, 1904 -- valid
  Sertularella conella Stechow, 1920 -- valid
  Sertularella conica Allman, 1877 -- valid
  Sertularella diaphana (Allman, 1885) -- valid
  Sertularella ellisi (Deshayes and Milne Edwards, 1836) -- valid
  Sertularella flabella (Nutting, 1904) -- valid
  Sertularella gaudichaudi (Lamouroux, 1824) -- valid
  Sertularella gayi (Lamouroux, 1821) -- valid
  Sertularella geniculata Hincks, 1874 -- invalid
  Sertularella gigantea Mereschowsky, 1878 -- valid
  Sertularella pinnata Clark, 1877 -- invalid
  Sertularella pinnigera Hartlaub, 1901 -- invalid
  Sertularella polyzonias (Linnaeus, 1758) -- valid -- great tooth hydroid, great tooth hydroid
  Sertularella rugosa (Linnaeus, 1758) -- valid -- snail trefoil hydroid, snail trefoil hydroid
  Sertularella tanneri Nutting, 1904 -- valid
  Sertularella tenella (Alder, 1856) -- valid
  Sertularia Linnaeus, 1758 -- valid
  Sertularia amplectens Allman, 1885 -- invalid
  Sertularia argentea Linnaeus, 1758 -- valid -- squirrel's tail hydroid
  Sertularia carolinensis Verrill, 1872 -- valid
  Sertularia cupressina Linnaeus, 1758 -- valid -- sea cypress hydroid, whiteweed hydroid
  Sertularia dalli (Nutting, 1904) -- valid
  Sertularia elegans (Kirchenpauer, 1884) -- valid
  Sertularia exigua Allman, 1877 -- invalid
  Sertularia fabricii Levinsen, 1893 -- valid
  Sertularia gracilis Hincks, 1861 -- invalid
  Sertularia inflata (Versluys, 1899) -- invalid
  Sertularia latiuscula Stimpson, 1854 -- valid
  Sertularia mayeri Nutting, 1904 -- invalid
  Sertularia plumosa (Clark, 1877) -- valid
  Sertularia plumulifera (Allman, 1877) -- valid
  Sertularia pourtalesi Nutting, 1877 -- invalid
  Sertularia robusta (Clark, 1877) -- valid
  Sertularia schmidti Kudelin, 1914 -- valid
  Sertularia similis Clark, 1877 -- valid
  Sertularia stookeyi Nutting, 1904 -- invalid
  Sertularia tenera G. O. Sars, 1874 -- valid
  Sertulariidae Lamouroux, 1812 -- valid
  Sessiliflorae Kükenthal, 1915 -- valid
  Siphonogorgia agassizii (Deichmann, 1936) -- valid
  Siphonophorae -- valid -- siphonophores
  Sminthea arctica Hartlaub, 1909 -- valid
  Solanderia gracilis Duchassaing and Michelin, 1846 -- valid -- black fan-shaped hydroid
  Solanderiidae Marshall, 1892 -- valid
  Solmaris corona (Keferstein and Ehlers, 1861) -- valid
  Solmarisidae -- valid
  Solmissus incisus (Fewkes, 1886) -- valid
  Solmissus marshalli A. Agassiz and Mayer, 1902 -- valid -- dinner plate medusa
  Solmundella bitentaculata (Quoy and Gaimard, 1833) -- valid
  Sphaerocoryne agassizii (McCrady, 1859) -- valid
  Sphaerocorynidae Prévot, 1959 -- valid
  Sphaeronectes gracilis (Claus, 1873) -- valid
  Sphaeronectes irregularis (Claus, 1873) -- valid
  Sphaeronectidae -- valid
  Spinimuricea atlantica (Johnson, 1862) -- valid
  Stachyptilidae -- valid
  Stachyptilum superbum Studer, 1894 -- valid
  Stauromedusae -- valid -- stalked jellyfish, stalked jellyfishes
  Staurophora mertensi Brandt, 1838 -- invalid -- whitecross jellyfish, whitecross jellyfish
  Stegopoma fastigiata (Alder, 1860) -- invalid
  Stegopoma plicatile (M. Sars, 1863) -- valid
  Stenisis humilis (Deichmann, 1936) -- valid
  Stephanophyes superba Chun, 1888 -- valid
  Sthenoniinae -- valid
  Stichopathes lutkeni (Brook, 1889) -- valid -- black sea whip, black wire coral, black wire coral
  Stomolophus meleagris L. Agassiz, 1862 -- valid -- cabbagehead, cannonball jelly, cannonball jellyfish
  Stomotoca atra L. Agassiz, 1862 -- valid
  Stomotoca mira (Fewkes, 1887) -- invalid
  Stygiomedusa gigantea (Browne, 1910) -- valid
  Stygiomedusinae -- valid
  Stylactaria arge (Clarke, 1882) -- invalid
  Stylantheca papillosa (Dall, 1884) -- valid
  Stylantheca petrograpta (Fisher, 1938) -- valid
  Stylantheca porphyra Fisher, 1931 -- valid
  Stylaster californicus (Verrill, 1866) -- valid -- California hydrocoral, california hydrocoral
  Stylaster campylecus (Fisher, 1938) -- valid
  Stylaster campylecus parageus (Fisher, 1938) -- valid
  Stylaster complanatus Pourtalès, 1867 -- valid
  Stylaster duchassaingi Pourtalès, 1867 -- valid
  Stylaster erubescens De Pourtalès, 1868 -- valid
  Stylaster erubescens erubescens Pourtalès, 1868 -- valid
  Stylaster filogranus Pourtalès, 1871 -- valid
  Stylaster laevigatus Cairns, 1986 -- valid
  Stylaster miniatus (Pourtalès, 1868) -- valid
  Stylaster scabiosus Broch, 1935 -- valid
  Stylaster stejnegeri (Fisher, 1938) -- valid
  Stylaster venustus (Verrill, 1870) -- valid
  Stylaster verrillii (Dall, 1884) -- valid
  Stylasteridae Gray, 1847 -- valid -- hydrocoralliaires, hydrocorals
  Stylatula antillarum Kölliker, 1872 -- valid
  Stylatula elegans (Danielssen, 1860) -- valid
  Stylatula elongata (Gabb, 1862) -- valid -- slender sea pen, slender sea pen
  Stylatula gracilis Verrill, 1864 -- valid
  Subselliflorae Kükenthal, 1915 -- valid
  Sulculeolaria biloba (M. Sars, 1846) -- valid
  Sulculeolaria chuni (Lens and van Riemsdijk, 1908) -- valid
  Sulculeolaria monoica (Chun, 1888) -- valid
  Sulculeolaria quadrivalvis Blainville, 1834 -- valid
  Sulculeolaria turgida (Gegenbaur, 1853) -- valid
  Swiftia casta (Verrill, 1883) -- valid
  Swiftia exserta Duchassaing and Michelotti, 1864 -- valid -- deepwater coral, red polyp octocoral
  Swiftia kofoidi (Nutting, 1909) -- valid
  Swiftia spauldingi (Nutting, 1909) -- valid
  Symplectoscyphus amphorifer (Allman, 1877) -- invalid
  Symplectoscyphus amphoriferus (Allman, 1877) -- valid
  Symplectoscyphus elegans (Nutting, 1904) -- valid
  Symplectoscyphus levinseni (Nutting, 1904) -- valid
  Symplectoscyphus pedrensis (Torrey, 1904) -- valid
  Symplectoscyphus pinnatus (Clark, 1877) -- valid
  Symplectoscyphus sinuosus (Fraser, 1948) -- valid
  Symplectoscyphus tricuspidatus (Alder, 1856) -- valid
  Symplectoscyphus turgidus (Trask, 1857) -- valid
  Synarachnactis brachiolata (A. Agassiz, 1862) -- valid
  Syntheciidae -- valid
  Synthecium gracile Fraser, 1937 -- invalid
  Synthecium projectum Fraser, 1938 -- invalid
  Synthecium symmetricum Fraser, 1938 -- valid
  Synthecium tubithecum (Allman, 1877) -- valid
  Tamarisca tamarisca (Linnaeus, 1758) -- valid -- sea tamarisk, sea tamarisk
  Tamoya haplonema Müller, 1859 -- valid
  Telesto flavula Deichmann, 1936 -- valid
  Telesto fruticulosa Dana, 1846 -- valid -- orange telesto
  Telesto nelleae Bayer, 1961 -- valid
  Telesto sanguinea Deichmann, 1936 -- valid
  Tetraplatia volitans Busch, 1851 -- valid
  Tetraplatidae -- valid
  Tetrapoma quadridentatum (Hincks, 1874) -- valid
  Tetrorchis erythrogaster Bigelow, 1909 -- valid
  Thaumatoscyphinae -- valid
  Thelogorgia studeri Bayer, 1991 -- valid
  Thesea citrina Deichmann, 1936 -- valid
  Thesea grandiflora Deichmann, 1936 -- valid
  Thesea guadalupensis (Duchassaing and Michelotti, 1860) -- valid
  Thesea nivea Deichmann, 1936 -- valid -- white eye sea spray
  Thesea rugosa Deichmann, 1936 -- valid
  Thesea solitaria (Pourtalès, 1868) -- valid
  Thuiaria alba Fraser, 1911 -- valid
  Thuiaria alternitheca Levinsen, 1893 -- valid
  Thuiaria articulata (Pallas, 1766) -- valid -- sea spleenwort
  Thuiaria carica Levinsen, 1893 -- valid
  Thuiaria desmoides (Torrey, 1902) -- valid
  Thuiaria fraseri (Calder, 1991) -- valid
  Thuiaria immersa Nutting, 1904 -- invalid
  Thuiaria laxa Allman, 1874 -- valid
  Thuiaria lonchitis (Ellis and Solander, 1786) -- invalid
  Thuiaria robusta Clark, 1877 -- invalid
  Thuiaria thuja (Linnaeus, 1758) -- valid -- bottlebrush hydroid, bottlebrush hydroid
  Thyroscyphidae -- valid
  Thyroscyphus marginatus Allman, 1877 -- invalid
  Thyroscyphus ramosus Allman, 1877 -- valid
  Tiarannidae -- valid
  Tiaropsidae -- valid
  Tiaropsidium kelsei Torrey, 1909 -- valid
  Tiaropsis multicirrata (M. Sars, 1835) -- valid
  Titanideum frauenfeldii (Kölliker, 1865) -- valid -- brilliant sea fingers
  Toxorchis kellneri Mayer, 1910 -- valid
  Trachymedusae Haeckel, 1866 -- valid
  Trichydra pudica Wright, 1858 -- valid
  Trichydridae Hincks, 1868 -- valid
  Tridentata distans (Lamouroux, 1816) -- valid
  Tridentata flowersi (Nutting, 1904) -- valid
  Tridentata marginata (Kirchenpauer, 1864) -- valid
  Tridentata tumida (Allman, 1877) -- valid
  Tridentata turbinata (Lamouroux, 1816) -- valid
  Tubiclava cornucopiae Norman, 1864 -- invalid
  Tubiclava laxa Fraser, 1938 -- invalid
  Tubularia acadiae Petersen, 1990 -- valid
  Tubularia aurea Fraser, 1936 -- valid
  Tubularia borealis Clark, 1876 -- invalid
  Tubularia couthouyi L. Agassiz, 1862 -- invalid
  Tubularia crassa Fraser, 1941 -- invalid
  Tubularia crocea (L. Agassiz, 1862) -- invalid
  Tubularia harrimani Nutting, 1901 -- valid
  Tubularia indivisa Linnaeus, 1758 -- valid -- tall tubularia, tall tubularia
  Tubularia larynx Ellis and Solander, 1786 -- invalid -- ringed tubularia
  Tubularia marina Torrey, 1902 -- invalid
  Tubularia regalis Boeck, 1860 -- valid
  Tubularia spectabilis (L. Agassiz, 1862) -- invalid
  Tubularia tenella (L. Agassiz, 1862) -- invalid
  Tubulariidae Fleming, 1828 -- valid
  Tulpa crenata (Allman, 1876) -- valid
  Turritopsis fascicularis Fraser, 1943 -- valid
  Turritopsis nutricula (McCrady, 1857) -- valid
  Ulmaridae Haeckel, 1880 -- valid
  Vallentinia adherens Hyman, 1947 -- valid
  Vampyrocrossota childressi Thuesen, 1993 -- valid
  Vannuccia forbesi (Mayer, 1894) -- invalid
  Velella velella (Linnaeus, 1758) -- valid -- by-the-wind sailor, by-the-wind sailor
  Ventromma halecioides (Alder, 1859) -- valid
  Villogorgia nigrescens Duchassaing and Michelotti, 1860 -- valid
  Virgularia agassizii Studer, 1894 -- valid
  Virgularia mirabilis (Müller, 1776) -- valid
  Virgularia presbytes Bayer, 1955 -- valid
  Virgularia reinwardti Herklots, 1858 -- valid
  Virgulariidae Verrill, 1868 -- valid
  Vogtia glabra H. B. Bigelow, 1918 -- valid
  Vogtia pentacantha Kölliker, 1853 -- valid
  Vogtia serrata (Moser, 1925) -- valid
  Vogtia spinosa Keferstein and Ehlers, 1861 -- valid
  Zanclea bomala Boero, Bouillon and Gravili, 2000 -- valid
  Zanclea costata Gegenbaur, 1857 -- valid
  Zanclea gemmosa McCrady, 1859 -- valid
  Zancleidae Russell, 1953 -- valid
  Zanclella bryozoophila Boero and Hewitt, 1992 -- valid
  Zancleopsidae Bouillon, 1978 -- valid
  Zancleopsis dichotoma (Mayer, 1900) -- valid
  Zoantharia de Blainville, 1830 -- invalid
  Zoantharia -- valid -- zoanthids, zoanthids
  Zoanthidae -- valid
  Zoanthus pulchellus Duchassaing and Michelotti, 1860 -- valid -- mat zoanthid
  Zygophylax adhaerens Fraser, 1938 -- valid
  Zygophylax carolinus (Fraser, 1911) -- valid
  Zygophylax cervicornis (Nutting, 1905) -- valid
  Zygophylax convallarius (Allman, 1877) -- valid
  Zygophylax crassitheca (Fraser, 1941) -- valid
  Zygophylax pinnatus (G. O. Sars, 1874) -- valid
  Zygophylax reflexus (Fraser, 1948) -- valid
  Zygophylax rigidus (Fraser, 1948) -- valid
  Zygophylax robustus (Verrill, 1873) -- valid
  Zyzzyzus Stechow, 1921 -- valid
  Zyzzyzus floridanus Petersen, 1990 -- valid
   

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