Abraliopsis gilchristi (G. C. Robson, 1924) (additional source)
Acanthopriapulus horridus (Théel, 1911) (additional source)
Achelia assimilis (Haswell, 1885) (additional source)
Achelia communis (Bouvier, 1906) (additional source)
Achelia dohrni (Thompson, 1884) (additional source)
Achelia hoekii (Pfeffer, 1889) (additional source)
Achelia lagena Child, 1994 (additional source)
Achelia megacephala Hodgson, 1914 (basis of record)
Achelia parvula (Loman, 1923) (additional source)
Achelia quadridentata (Hodgson, 1910) (additional source)
Achelia serratipalpis (Bouvier, 1911) (additional source)
Achelia sufflata Gordon, 1944 (additional source)
Achelia transfuga Stock, 1954 (additional source)
Adagnesia antarctica Kott, 1969 (additional source)
Adagnesia weddelli Monniot C. & Monniot F., 1994 (additional source)
Adropion Pilato, 1987 (basis of record)
Adropion greveni (Dastych, 1984) (basis of record)
Agnezia arnaudi (Monniot C. & Monniot F., 1974) (additional source)
Agnezia biscoei (Monniot C. & Monniot F., 1983) (additional source)
Agnezia glaciata Michaelsen, 1898 (additional source)
Ainigmaptilon Dean, 1926 (basis of record)
Aiptasiomorpha Stephenson, 1920 (additional source)
Alloeocarpa incrustans (Herdman, 1886) (additional source)
Alomasoma Zenkevitch, 1958 (basis of record)
Alomasoma belyaevi Zenkevitch, 1964 (basis of record)
Alomasoma chaetiferum Zenkevitch, 1958 (basis of record)
Althoffia tumida Lohmann, 1892 (additional source)
Ammothea allopodes Fry & Hedgpeth, 1969 (additional source)
Ammothea antipodensis Clark, 1972 (additional source)
Ammothea armentis Child, 1994 (additional source)
Ammothea bentartica Munilla, 2001 (basis of record)
Ammothea bicorniculata Stiboy-Risch, 1992 (additional source)
Ammothea bigibbosa Munilla & Ramos, 2005 (additional source)
Ammothea calmani Gordon, 1932 (additional source)
Ammothea carolinensis Leach, 1814 (additional source)
Ammothea clausi Pfeffer, 1889 (additional source)
Ammothea gibbosa Bouvier, 1913 accepted as Ammothea carolinensis Leach, 1814 (basis of record)
Ammothea gigantea Gordon, 1932 (additional source)
Ammothea glacialis (Hodgson, 1907) (additional source)
Ammothea gordonae Child, 1994 (additional source)
Ammothea longispina Gordon, 1932 (additional source)
Ammothea meridionalis Hodgson, 1914 (additional source)
Ammothea minor (Hodgson, 1907) (additional source)
Ammothea sextarticulata Munilla, 1991 (additional source)
Ammothea spinosa (Hodgson, 1907) (additional source)
Ammothea striata (Möbius, 1902) (additional source)
Ammothea stylirostris Gordon, 1932 (additional source)
Ammothea tetrapora Gordon, 1932 (additional source)
Ammothea tibialis Munilla, 2002 (basis of record)
Amphitretus Hoyle, 1885 (basis of record)
Amphitretus pelagicus Hoyle, 1885 (basis of record)
Anoplodactylus australis (Hodgson, 1914) (additional source)
Anoplodactylus californicus Hall, 1912 (additional source)
Anoplodactylus laminifer Arnaud, 1974 (additional source)
Anoplodactylus neglectus Hoek, 1898 accepted as Anoplodactylus typhlops Sars, 1888 (basis of record)
Anoplodactylus petiolatus (Krøyer, 1844) (additional source)
Anoplodactylus typhlops Sars, 1888 (additional source)
Anoplodactylus vemae Child, 1982 (additional source)
Anoplodactylus virescens (Hodge, 1864) (additional source)
Aphrodroma Olson, 2000 (basis of record)
Aphrodroma brevirostris (Lesson, 1831) (basis of record)
Apionsoma (Apionsoma) murinae (Cutler, 1969) (additional source)
Aplidiopsis discoveryi Millar, 1960 (additional source)
Aplidiopsis georgianum (Sluiter, 1932) accepted as Synoicum georgianum Sluiter, 1932 (additional source)
Aplidium annulatum Sluiter, 1906 (additional source)
Aplidium aurorae (Harant & Vernières, 1938) (additional source)
Aplidium balleniae Monniot C. & Monniot F., 1983 (additional source)
Aplidium bilinguae Monniot C. & Monniot F., 1983 (additional source)
Aplidium caeruleum (Sluiter, 1906) (additional source)
Aplidium circumvolutum (Sluiter, 1900) (additional source)
Aplidium cyaneum Monniot C. & Monniot F., 1983 (additional source)
Aplidium falklandicum Millar, 1960 (additional source)
Aplidium fuegiense (Cunningham, 1871) (additional source)
Aplidium globosum (Herdman, 1886) (additional source)
Aplidium imbutum Monniot C. & Monniot F., 1983 (additional source)
Aplidium irregulare (Herdman, 1886) (additional source)
Aplidium longum Monniot F., 1970 (additional source)
Aplidium loricatum (Harant & Vernières, 1938) (additional source)
Aplidium meridianum (Sluiter, 1906) (additional source)
Aplidium millari Monniot C. & Monniot F., 1994 (additional source)
Aplidium miripartum Monniot C. & Monniot F., 1983 (additional source)
Aplidium ordinatum (Sluiter, 1906) (additional source)
Aplidium paessleri (Michaelsen, 1907) (additional source)
Aplidium radiatum (Sluiter, 1906) (additional source)
Aplidium recumbens (Herdman, 1886) (additional source)
Aplidium siderum Monniot C. & Monniot F., 1983 (additional source)
Aplidium stanleyi Millar, 1960 (additional source)
Aplidium triplex (Sluiter, 1906) accepted as Synoicum triplex (Sluiter, 1906) (additional source)
Aplidium vanhoeffeni Hartmeyer, 1911 (additional source)
Aplidium variabile (Herdman, 1886) (additional source)
Aplidium vastum (Sluiter, 1912) (additional source)
Appendicularia sicula Fol, 1874 (additional source)
Appendicularia tregouboffi Fenaux, 1960 (additional source)
Arntzia López-González, Gili & Orejas, 2002 (basis of record)
Asajirus indicus (Oka, 1913) (additional source)
Ascidia challengeri Herdman, 1882 (additional source)
Ascidia meridionalis Herdman, 1880 (additional source)
Ascolepis Thomson & Rennet, 1931 accepted as Fannyella (Fannyella) Gray, 1872 (basis of record)
Ascorhynchus antipodus Child, 1987 (additional source)
Ascorhynchus cooki Child, 1987 (additional source)

English 10-tentacle burrowing anemone for Halcampa decemtentaculata Hand, 1955
English 12-tentacle burrowing anemone for Halcampa duodecimcirrata (Sars, 1851)
English 12-tentacle parasitic anemone for Peachia parasitica (Agassiz, 1861)
English Abbott's booby for Papasula abbotti Ridgway, 1893
English aberrant toothshell for Gadila aberrans (Whiteaves, 1887)
English adhesive sea anemone for Cryptodendrum adhaesivum (Klunzinger, 1877)
English African pillow coral for Siderastrea savignyana Milne Edwards & Haime, 1849
English African squid [from synonym] for Loligo africana (Adam, 1950)
English Agassiz toothshell for Gadila agassizii (Dall, 1881)
English Alaskan anemone for Charisea saxicola Torrey, 1902
English Aleutian tern [from synonym] for Sterna aleutica Baird, 1869
English Amazon tern [from synonym] for Sterna superciliaris Vieillot, 1819
English American tuskshell for Paradentalium americanum (Chenu, 1843)
English anagolous bobtail for Sepiola affinis Naef, 1912
English ancient murrelet for Synthliboramphus antiquus (Gmelin, 1789)
English Andean gull for Larus serranus Tschudi, 1844
English Andrew's frigatebird for Fregata andrewsi Mathews, 1914
English anemone coral for Goniopora albiconus Veron, 2000
English anemone coral for Goniopora burgosi Nemenzo, 1955
English anemone coral for Goniopora cellulosa Veron, 1990
English anemone coral for Goniopora ciliatus Veron, 2000
English anemone coral for Goniopora columna Dana, 1846
English anemone coral for Goniopora djiboutiensis Vaughan, 1907
English anemone coral for Goniopora eclipsensis Veron & Pichon, 1982
English anemone coral for Goniopora fruticosa Saville-Kent, 1891
English anemone coral for Goniopora lobata Milne Edwards, 1860
English anemone coral [from synonym] for Goniopora minor Crossland, 1952
English anemone coral for Goniopora norfolkensis Veron & Pichon, 1982
English anemone coral for Goniopora palmensis Veron & Pichon, 1982
English anemone coral for Goniopora pandoraensis Veron & Pichon, 1982
English anemone coral for Goniopora pearsoni Veron, 2000
English anemone coral for Goniopora pendulus Veron, 1985
English anemone coral for Goniopora planulata (Ehrenberg, 1834)
English anemone coral for Goniopora polyformis (Zou, 1980)
English anemone coral for Goniopora savignyi Dana, 1846
English anemone coral for Goniopora somaliensis Vaughan, 1907
English anemone coral for Goniopora stokesi Milne Edwards & Haime, 1851
English anemone coral [from synonym] for Goniopora stutchburyi Wells, 1955
English anemone coral for Goniopora sultani Veron, DeVantier & Turak, 2000
English anemone coral for Goniopora tenella (Quelch, 1886)
English anemone coral for Goniopora tenuidens (Quelch, 1886)
English angel squid for Ancistroteuthis lichtensteinii (A. Férussac [in A. Férussac & d'Orbigny], 1835)
English Angola flying squid for Todarodes angolensis Adam, 1962
English angular sea whip for Pterogorgia anceps (Pallas, 1766)
English annulate sticky hydroid for Eudendrium vaginatum Allman, 1863
English annulate tuskshell for Episiphon sowerbyi (Guilding, 1834)
English Antarctic flying squid for Todarodes filippovae Adam, 1975
English Antarctic fulmar for Fulmarus glacialoides (Smith, 1840)
English Antarctic neosquid for Alluroteuthis antarcticus Odhner, 1923
English Antarctic skua [from synonym] for Catharacta antarctica (Lesson, 1831)
English Antillean tuskshell [from synonym] for Antalis antillaris (A. d'Orbigny, 1847)
English Antilles bobtail squid for Austrorossia antillensis (G. L. Voss, 1955)
English Arafura file snake for Acrochordus arafurae McDowell, 1979
English arch-beaked whale for Mesoplodon carlhubbsi Moore, 1963
English Arctic brooding anemone for Epiactis arctica (Verrill, 1868)
English Argentine shortfin squid for Illex argentinus (Castellanos, 1960)
English armed cranch squid for Galiteuthis armata Joubin, 1898
English Armenian gull for Larus armenicus Buturlin, 1934
English Arnoux's beaked whale for Berardius arnuxii Duvernoy, 1851
English artichoke coral for Scolymia cubensis (Milne Edwards & Haime, 1848)
English Ascension frigatebird for Fregata aquila (Linnaeus, 1758)
English ashy storm-petrel for Oceanodroma homochroa (Coues, 1864)
English Atlantic armhook squid for Gonatus steenstrupi Kristensen, 1981
English Atlantic banded octopus for Octopus zonatus G. L. Voss, 1968
English Atlantic bird squid for Ornithoteuthis antillarum Adam, 1957
English Atlantic bobtail for Sepiola atlantica A. d'Orbigny, 1842
English Atlantic cranch squid for Teuthowenia megalops (Prosch, 1849)
English Atlantic gonate squid for Gonatus steenstrupi Kristensen, 1981
English Atlantic hump-backed dolphin for Sousa teuszii (Kükenthal, 1892)
English Atlantic mushroom coral for Scolymia lacera (Pallas, 1766)
English Atlantic warty octopus for Scaeurgus unicirrhus (Delle Chiaje, 1841)
English Auckland chag [from synonym] for Phalacrocorax colensoi Buller, 1888
English Audouin's gull for Larus audouinii Payraudeau, 1826
English Australasian gannet for Morus serrator (Gray, 1843)
English Australian fur seal for Arctocephalus pusillus (Schreber, 1775)
English Australian pelican for Pelecanus conspicillatus Temminck, 1824
English Australian snubfin dolphin for Orcaella heinsohni Beasley, Robertson & Arnold, 2005
English banana coral for Trachyphyllia geoffroyi (Audouin, 1826)
English banded tuskshell for Antalis circumcincta (R. B. Watson, 1879)
English banded water snake for Nerodia fasciata (Linnaeus, 1766)
English band-rumped storm-petrel for Oceanodroma castro (Harcourt, 1851)
English bank cormorant for Phalacrocorax neglectus (Wahlberg, 1855)
English Bartsch's squid for Uroteuthis bartschi Rehder, 1945
English beaded sea anemone for Heteractis aurora (Quoy & Gaimard, 1833)
English bean coral for Euphyllia fimbriata (Spengler, 1799)
English Beck's petrel for Pseudobulweria becki (Murphy, 1928)
English Beka squid [from synonym] for Loligo beka Sasaki, 1929
English Bennetts watersnake [from synonym] for Enhydris bennetti (Gray, 1842)
English Bermuda petrel for Pterodroma cahow (Nichols & Mowbray, 1916)
English berry armhook squid for Gonatus berryi Naef, 1923
English berry tuskshell for Antalis berryi (A. G. Smith & M. Gordon, 1948)
English bigeye inshore squid [from synonym] for Loligo ocula Cohen, 1976
English big-fin bobtail squid for Rossia megaptera A. E. Verrill, 1881
English black fan-shaped hydroid for Solanderia gracilis Duchassaing & Michelin, 1846
English black jelly for Chrysaora achlyos Martin, Gershwin, Burnett, Cargo & Bloom, 1997
English black noddy for Anous minutus Boie, 1844
English black right whale for Balaena mysticetus Linnaeus, 1758
English Black Sea fan for Iciligorgia schrammi Duchassaing, 1870
English Black Sea rod for Plexaura homomalla (Esper, 1794)
English Black Sea turtle [from synonym] for Chelonia agassizii Bocourt, 1868