Aapticheilichthys Huber, 2011 (basis of record)
Aapticheilichthys websteri (Huber, 2007) (basis of record)
Aaptosyax grypus Rainboth, 1991 (basis of record)
Abactochromis Oliver & Arnegard, 2010 (basis of record)
Abactochromis labrosus (Trewavas, 1935) (basis of record)
Abalistes filamentosus Matsuura & Yoshino, 2004 (additional source)
Abalistes stellaris (Bloch & Schneider, 1801) accepted as Abalistes stellatus (Anonymous, 1798) (additional source)
Abalistes stellatus (Anonymous, 1798) (basis of record)
Abalistes stellatus (Anonymous, 1798) (additional source)
Abantennarius Schultz, 1957 (basis of record)
Abantennarius analis Schultz, 1957 (basis of record)
Abantennarius rosaceus (Smith & Radcliffe, 1912) (basis of record)
Abbottina binhi Nguyen, 2001 (basis of record)
Abbottina lalinensis Huang & Li, 1995 (basis of record)
Abbottina liaoningensis Qin, 1987 (basis of record)
Abbottina obtusirostris (Wu & Wang, 1931) (basis of record)
Abbottina rivularis (Basilewsky, 1855) (basis of record)
Ablabys binotatus (Peters, 1855) (additional source)
Ablabys gymnothorax Chungthanawong & Motomura, 2018 (basis of record)
Ablabys macracanthus (Bleeker, 1852) (additional source)
Ablabys pauciporus Chungthanawong & Motomura, 2018 (basis of record)
Ablabys taenianotus (Cuvier, 1829) (basis of record)
Ablennes Jordan & Fordice, 1887 (basis of record)
Ablennes hians (Valenciennes, 1846) (additional source)
Aboma Jordan & Starks, 1895 (additional source)
Aboma etheostoma Jordan & Starks, 1895 (additional source)
Aborichthys barapensis Nanda & Tamang, 2021 (basis of record)
Aborichthys cataracta Arunachalam, Raja, Malaiammal & Mayden, 2014 (basis of record)
Aborichthys elongatus Hora, 1921 (basis of record)
Aborichthys garoensis Hora, 1925 (basis of record)
Aborichthys iphipaniensis Kosygin, Gurumayum, Singh & Chowdhury, 2019 (basis of record)
Aborichthys kailashi Shangningam, Kosygin, Sinha & Gurumayum, 2019 (basis of record)
Aborichthys kempi Chaudhuri, 1913 (basis of record)
Aborichthys pangensis Shangningam, Kosygin, Sinha & Gurumayum, 2019 (basis of record)
Aborichthys rosammai Sen, 2009 (basis of record)
Aborichthys tikaderi Barman, 1985 (basis of record)
Aborichthys verticauda Arunachalam, Raja, Malaiammal & Mayden, 2014 (basis of record)
Aborichthys waikhomi Kosygin, 2012 (basis of record)
Abramis brama (Linnaeus, 1758) (additional source)
Abramites eques (Steindachner, 1878) (basis of record)
Abramites hypselonotus (Günther, 1868) (basis of record)
Abudefduf Forsskål, 1775 (additional source)
Abudefduf abdominalis (Quoy & Gaimard, 1825) (additional source)
Abudefduf bengalensis (Bloch, 1787) (basis of record)
Abudefduf bengalensis (Bloch, 1787) (additional source)
Abudefduf concolor (Gill, 1862) (additional source)
Abudefduf conformis Randall & Earle, 1999 (additional source)
Abudefduf declivifrons (Gill, 1862) (additional source)
Abudefduf hoefleri (Steindachner, 1881) (additional source)
Abudefduf lorenzi Hensley & Allen, 1977 (additional source)
Abudefduf luridus (Cuvier, 1830) accepted as Similiparma lurida (Cuvier, 1830) (additional source)
Abudefduf margariteus (Cuvier, 1830) (basis of record)
Abudefduf natalensis Hensley & Randall, 1983 (basis of record)
Abudefduf nigrimargo Wibowo, Koeda, Muto & Motomura, 2018 (basis of record)
Abudefduf notatus (Day, 1870) (additional source)
Abudefduf saxatilis (Linnaeus, 1758) (additional source)
Abudefduf septemfasciatus (Cuvier, 1830) (additional source)
Abudefduf sexfasciatus (Lacepède, 1801) (additional source)
Abudefduf sordidus (Forsskål, 1775) (additional source)
Abudefduf sparoides (Quoy & Gaimard, 1825) (additional source)
Abudefduf taurus (Müller & Troschel, 1848) (additional source)
Abudefduf troschelii (Gill, 1862) (additional source)
Abudefduf vaigiensis (Quoy & Gaimard, 1825) (basis of record)
Abudefduf whitleyi Allen & Robertson, 1974 (additional source)
Abyssoberyx Merrett & Moore, 2005 (basis of record)
Abyssoberyx levisquamosus Merrett & Moore, 2005 (basis of record)
Abyssobrotula galatheae Nielsen, 1977 (additional source)
Abyssobrotula hadropercularis Ohashi & Nielsen, 2016 (basis of record)
Abyssocottus elochini Taliev, 1955 (basis of record)
Abyssocottus fuscus Bogdanov, 2013 (basis of record)
Abyssocottus gibbosus Berg, 1906 (basis of record)
Abyssocottus korotneffi Berg, 1906 (basis of record)
Abyssocottus pumilus Bogdanov, 2013 (basis of record)
Abythites Nielsen & Cohen, 1973 accepted as Cataetyx Günther, 1887 (basis of record)
Abythites lepidogenys (Smith & Radcliffe, 1913) accepted as Cataetyx lepidogenys (Smith & Radcliffe, 1913) (basis of record)
Acanthalburnus microlepis (De Filippi, 1863) accepted as Acanthobrama microlepis (De Filippi, 1863) (basis of record)
Acanthaluteres brownii (Richardson, 1846) (additional source)
Acanthaluteres spilomelanurus (Quoy & Gaimard, 1824) (additional source)
Acanthaluteres vittiger (Castelnau, 1873) (additional source)
Acanthanectes Holleman & Buxton, 1993 (additional source)
Acanthanectes hystrix Holleman & Buxton, 1993 (basis of record)
Acanthanectes rufus Holleman & Buxton, 1993 (basis of record)
Acanthaphritis barbata (Okamura & Kishida, 1963) (additional source)
Acanthaphritis grandisquamis Günther, 1880 (additional source)
Acanthaphritis ozawai (McKay, 1971) (additional source)
Acanthaphritis unoorum Suzuki & Nakabo, 1996 (additional source)
Acanthemblemaria aceroi Hastings, Eytan & Summers, 2020 (basis of record)
Acanthemblemaria aspera (Longley, 1927) (additional source)
Acanthemblemaria atrata Hastings & Robertson, 1999 (additional source)
Acanthemblemaria balanorum Brock, 1940 (additional source)
Acanthemblemaria betinensis Smith-Vaniz & Palacio, 1974 (additional source)
Acanthemblemaria castroi Stephens & Hobson, 1966 (additional source)
Acanthemblemaria chaplini Böhlke, 1957 (additional source)
Acanthemblemaria crockeri Beebe & Tee-Van, 1938 (additional source)
Acanthemblemaria exilispinus Stephens, 1963 (additional source)
Acanthemblemaria greenfieldi Smith-Vaniz & Palacio, 1974 (additional source)
Acanthemblemaria hancocki Myers & Reid, 1936 (additional source)
Acanthemblemaria harpeza Williams, 2002 (additional source)
Acanthemblemaria hastingsi Lin & Galland, 2010 (basis of record)
Acanthemblemaria johnsoni Almany & Baldwin, 1996 (additional source)

Albanian ngjale deti e baleareve for Ariosoma balearicum (Delaroche, 1809)
Albanian peshk derr [from synonym] for Balistes carolinensis Gmelin, 1789
Bengali Loitta for Harpadon nehereus (Hamilton, 1822)
Croatian babica kokošica for Aidablennius sphynx (Valenciennes, 1836)
Croatian cnerj for Chromis chromis (Linnaeus, 1758)
Croatian indijanac for Chromis chromis (Linnaeus, 1758)
Croatian jera for Anthias anthias (Linnaeus, 1758)
Croatian kaliger for Chromis chromis (Linnaeus, 1758)
Croatian kirnjica for Anthias anthias (Linnaeus, 1758)
Croatian matulicic [from synonym] for Apogon (Apogon) imberbis (Linnaeus, 1758)
Croatian mlijec ružicni for Aphia minuta (Risso, 1810)
Croatian razok for Bothus podas (Delaroche, 1809)
Croatian ugoric zlatar for Ariosoma balearicum (Delaroche, 1809)
Czech úhoř mořský for Conger conger (Linnaeus, 1758)
Czech úhořovec malý for Ariosoma balearicum (Delaroche, 1809)
Danish Balearisk havål for Ariosoma balearicum (Delaroche, 1809)
Danish bredøjet hvarre for Bothus podas (Delaroche, 1809)
Danish haneslimfisk for Aidablennius sphynx (Valenciennes, 1836)
Danish middelhavskardinalfisk [from synonym] for Apogon (Apogon) imberbis (Linnaeus, 1758)
Danish ringhavrude for Diplodus annularis (Linnaeus, 1758)
Danish spidssnudet havrude for Diplodus puntazzo (Walbaum, 1792)
Dutch breedsnuitrog for Bathyraja brachyurops (Fowler, 1910)
Dutch kever for Trisopterus esmarkii (Nilsson, 1855)
English abas for Gymnarchidae Bleeker, 1859
English Aden splitfin [from synonym] for Synagrops adeni Kotthaus, 1970
English aestivating lungfishes for Lepidosirenidae Bonaparte, 1841
English African angelshark for Squatina africana Regan, 1908
English African basslet for Liopropoma africanum (Smith, 1954)
English African butterflyfish for Chaetodon dolosus Ahl, 1923
English African chimaera for Hydrolagus africanus (Gilchrist, 1922)
English African coris [from synonym] for Coris gaimard africana Smith, 1957
English African deepwater flathead for Parabembras robinsoni Regan, 1921
English African demoiselle for Neopomacentrus fuliginosus (Smith, 1960)
English African eel blenny for Haliophis guttatus (Forsskål, 1775)
English African forktail snapper for Apsilus fuscus Valenciennes, 1830
English African longfin eel for Anguilla mossambica (Peters, 1852)
English African lungfishes for Protopteridae Peters, 1855
English African pikes for Hepsetidae Hubbs, 1939
English African pompano for Alectis ciliaris (Bloch, 1787)
English African ribbontail catshark for Eridacnis sinuans (Smith, 1957)
English African righteye flounder for Poecilopsetta natalensis Norman, 1931
English African rivulines for Nothobranchiidae Garman, 1895
English African sailfin flyingfish [from synonym] for Parexocoetus mento mento (Valenciennes, 1847)
English African scad for Trachurus delagoa Nekrasov, 1970
English African sea catfish for Arius africanus Günther, 1867
English African spadefish for Tripterodon orbis Playfair, 1867
English African spotted catshark for Holohalaelurus punctatus (Gilchrist, 1914)
English African tetras for Alestidae Cockerell, 1910
English airbreathing catfishes for Clariidae Bonaparte, 1845
English airsac catfishes for Heteropneustidae Hora, 1936
English albacore for Thunnus alalunga (Bonnaterre, 1788)
English alfonsino for Beryx decadactylus Cuvier, 1829
English algae eaters for Gyrinocheilidae Gill, 1905
English Allard's anemonefish for Amphiprion allardi Klausewitz, 1970
English alligator pipefish for Syngnathoides biaculeatus (Bloch, 1785)
English Almaco jack for Seriola rivoliana Valenciennes, 1833
English aloha grenadier for Nezumia propinqua (Gilbert & Cramer, 1897)
English American soles for Achiridae Rafinesque, 1815
English angler catfish for Chacidae Bleeker, 1858
English Antarctic dragonfishes for Bathydraconidae Regan, 1913
English Antarctic sculpins for Bathylutichthyidae Balushkin & Voskoboynikova, 1990
English antenna codlet for Bregmaceros atlanticus Goode & Bean, 1886
English Arab blenny for Omobranchus fasciolatus (Valenciennes, 1836)
English Arabian angelfish for Pomacanthus asfur (Forsskål, 1775)
English Arabian butterflyfish for Chaetodon melapterus Guichenot, 1863
English Arabian gizzard shad for Nematalosa arabica Regan, 1917
English Arabian monocle bream for Scolopsis ghanam (Forsskål, 1775)
English Arabian pandora for Pagellus affinis Boulenger, 1888
English Arabian scad for Trachurus indicus Nekrasov, 1966
English Arabian smooth-hound for Mustelus mosis Hemprich & Ehrenberg, 1899
English arc-eye hawkfish for Paracirrhites arcatus (Cuvier, 1829)
English archerfishes for Toxotidae Bleeker, 1859
English Arctic sand lance for Ammodytes hexapterus Pallas, 1814
English areolate grouper for Epinephelus areolatus (Forsskål, 1775)
English armored catfishes for Loricariidae Rafinesque, 1815
English armored gurnards for Peristediidae Jordan & Gilbert, 1883
English armored searobins for Peristediidae Jordan & Gilbert, 1883
English armored sticklebacks for Indostomidae Prashad & Mukerji, 1929
English armorhead catfishes for Cranoglanididae Myers, 1931
English arowanas for Osteoglossidae Bonaparte, 1845
English Aru gudgeon for Oxyeleotris aruensis (Weber, 1911)
English Asian leaffishes for Nandidae Bleeker, 1852
English Asian seaperches for Lateolabracidae Ghedotti, Davis & Smith, 2018
English Atlantic blue marlin for Makaira nigricans Lacepède, 1802
English Atlantic bonito for Sarda sarda (Bloch, 1793)
English Atlantic horse mackerel for Trachurus trachurus (Linnaeus, 1758)
English Atlantic red eels for Myrocongridae Gill, 1890
English Atlantic sturgeon [from synonym] for Acipenser oxyrinchus oxyrinchus Mitchill, 1815
English Atlantic tripletail for Lobotes surinamensis (Bloch, 1790)
English Atlantic weasel shark for Paragaleus pectoralis (Garman, 1906)
English attenuated spider fish for Bathypterois atricolor Alcock, 1896
English aulopus for Aulopidae Bonaparte, 1831
English Australian bonytongue for Scleropages jardinii (Saville-Kent, 1892)
English Australian lungfish for Ceratodontidae †
English Australian prowfishes for Pataecidae Gill, 1872
English Australian salmon for Arripidae Gill, 1893
English austroglanids for Austroglanididae Mo, 1991
English axilspot hogfish for Bodianus axillaris (Bennett, 1832)
English Ayu fish for Plecoglossidae Bleeker, 1859
English Baelama anchovy for Thryssa baelama (Forsskål, 1775)