Between brackets is the number of accepted marine extant species

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Shows the number of accepted marine extant species within the taxon
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- Biota (247 578)
- Kingdom Animalia (211 542)
- Subkingdom Animalia incertae sedis
- Subkingdom Metazoa accepted as Animalia
- Phylum Acanthocephala (516)
- Phylum Annelida (14 107)
- Phylum Arthropoda (59 758)
- Phylum Aschelminthes
- Phylum Brachiopoda (408)
- Phylum Bryozoa (6 545)
- Phylum Cephalorhyncha
- Phylum Chaetognatha (132)
- Phylum Chordata (24 096)
- Subphylum Cephalochordata (30)
- Subphylum Tunicata (3 134)
- Subphylum Urochordata accepted as Tunicata
- Subphylum Vertebrata (20 932)
- Infraphylum Agnatha (103)
- Infraphylum Gnathostomata (20 829)
- Parvphylum Chondrichthyes (1 291)
- Parvphylum Osteichthyes (18 645)
- Gigaclass Actinopterygii (18 643)
- Superclass Actinopteri (18 642)
- Class Chondrostei (25)
- Class Holostei (4)
- Class Teleostei (18 613)
- Order Acanthuriformes (441)
- Order Acropomatiformes (308)
- Order Albuliformes (13)
- Order Alepocephaliformes (144)
- Order Anabantiformes (28)
- Order Anguilliformes (1 052)
- Order Argentiniformes (97)
- Order Ateleopodiformes (14)
- Order Atheriniformes (151)
- Order Aulopiformes (295)
- Order Batrachoidiformes (78)
- Order Beloniformes (212)
- Order Beryciformes (125)
- Order Blenniiformes (955)
- Order Callionymiformes (213)
- Order Carangaria incertae sedis (96)
- Order Carangiformes (172)
- Order Centrarchiformes (178)
- Order Cetomimiformes accepted as Beryciformes
- Order Characiformes (35)
- Order Cichliformes (67)
- Order Clupeiformes (359)
- Order Cypriniformes (318)
- Order Cyprinodontiformes (114)
- Order Dactylopteriformes (14)
- Order Elopiformes (9)
- Order Esociformes (2)
- Order Eupercaria incertae sedis (1 787)
- Order Gadiformes (641)
- Order Galaxiiformes (12)
- Order Gasterosteiformes accepted as Gasterosteoidei
- Order Gobiesociformes (179)
- Order Gobiiformes (1 931)
- Family Butidae Bleeker, 1874 accepted as Butinae Bleeker, 1874
- Family Eleotridae Bonaparte, 1835 (89)
- Subfamily Butinae Bleeker, 1874 (25)
- Subfamily Eleotrinae Bonaparte, 1835 (63)
- Genus Alexurus Jordan, 1895 accepted as Erotelis Poey, 1860
- Genus Alvarius Girard, 1859 accepted as Gobiomorus Lacepède, 1800
- Genus Belobranchus Bleeker, 1857 (2)
- Genus Bunaka Herre, 1927 (1)
- Genus Calumia Smith, 1958 (4)
- Genus Culius Bleeker, 1856 accepted as Eleotris Bloch & Schneider, 1801
- Genus Dormitator Gill, 1861 (3)
- Genus Eleoris accepted as Eleotris Bloch & Schneider, 1801
- Genus Eleotris Bloch & Schneider, 1801 (26)
- Genus Elestris accepted as Eleotris Bloch & Schneider, 1801
- Genus Erotelis Poey, 1860 (3)
- Genus Giuris Sauvage, 1880 (7)
- Genus Giurus accepted as Giuris Sauvage, 1880
- Genus Gobiomorphus Gill, 1863 (5)
- Genus Gobiomorus Lacepède, 1800 (3)
- Genus Guavina Bleeker, 1874 (2)
- Genus Hypseleotris Gill, 1863 (4)
- Species Hypseleotris agilis Herre, 1927 accepted as Giuris laglaizei (Sauvage, 1880)
- Species Hypseleotris bipartita Herre, 1927 accepted as Hypseleotris cyprinoides (Valenciennes, 1837)
- Species Hypseleotris compressocephalus (Chen, 1985)
- Species Hypseleotris cyprinoides (Valenciennes, 1837)
- Species Hypseleotris dayi Smith, 1950 accepted as Hypseleotris cyprinoides (Valenciennes, 1837)
- Species Hypseleotris guentheri (Bleeker, 1875)
- Species Hypseleotris guntheri (Bleeker, 1875) accepted as Hypseleotris guentheri (Bleeker, 1875)
- Species Hypseleotris hainanensis Chen, 1985 accepted as Neodontobutis hainanensis (Chen, 1985)
- Species Hypseleotris leuciscus (Bleeker, 1853)
- Species Hypseleotris modestus (Bleeker, 1875) accepted as Hypseleotris leuciscus (Bleeker, 1853)
- Species Hypseleotris raji Herre, 1945 accepted as Butis koilomatodon (Bleeker, 1849)
- Species Hypseleotris swinhonis (Günther, 1873) accepted as Micropercops swinhonis (Günther, 1873)
- Species Hypseleotris swinhornis (Günther, 1873) accepted as Micropercops swinhonis (Günther, 1873)
- Genus Lembus Günther, 1859 accepted as Gobiomorus Lacepède, 1800
- Genus Leptophilypnus Meek & Hildebrand, 1916 (1)
- Genus Lizettea Herre, 1936 accepted as Bunaka Herre, 1927
- Genus Microeleotris Meek & Hildebrand, 1916 accepted as Leptophilypnus Meek & Hildebrand, 1916
- Genus Ophieleotris Aurich, 1938 accepted as Giuris Sauvage, 1880
- Genus Philypnodon Bleeker, 1874 (2)
- Genus Philypnus Valenciennes, 1837 accepted as Gobiomorus Lacepède, 1800
- Subfamily Milyeringinae Whitley, 1945 (1)
- Family Gobiidae Cuvier, 1816 (1 696)
- Family Kraemeriidae Whitley, 1935 (8)
- Family Microdesmidae Regan, 1912 (93)
- Family Milyeringidae Whitley, 1945 accepted as Milyeringinae Whitley, 1945
- Family Odontobutidae Hoese & Gill, 1993 (5)
- Family Oxudercidae Günther, 1861 accepted as Oxudercinae Günther, 1861
- Family Rhyacichthyidae Jordan, 1905 (3)
- Family Schindleriidae Giltay, 1934 (8)
- Family Thalasseleotrididae Gill & Mooi, 2012 (3)
- Family Trichonotidae Günther, 1861 (10)
- Family Xenisthmidae Miller, 1973 (16)
- Order Gonorynchiformes (6)
- Order Gymnotiformes (1)
- Order Holocentriformes (92)
- Order Kurtiformes (363)
- Order Lampriformes (27)
- Order Lophiiformes (399)
- Order Mugiliformes (77)
- Order Mulliformes (100)
- Order Myctophiformes (257)
- Order Notacanthiformes (28)
- Order Ophidiiformes (568)
- Order Osmeriformes (34)
- Order Osteoglossiformes (3)
- Order Ovalentaria incertae sedis (795)
- Order Perciformes (3 096)
- Order Pleuronectiformes (788)
- Order Polymixiiformes (12)
- Order Saccopharyngiformes accepted as Anguilliformes
- Order Salmoniformes (65)
- Order Scombriformes (284)
- Order Scorpaeniformes accepted as Scorpaenoidei
- Order Siluriformes (270)
- Order Stephanoberyciformes accepted as Beryciformes
- Order Stomiiformes (450)
- Order Stylephoriformes (1)
- Order Synbranchiformes (18)
- Order Syngnathiformes (324)
- Order Tetraodontiformes (412)
- Order Trachichthyiformes (68)
- Order Zeiformes (35)
- Superclass Cladistia (1)
- Gigaclass Sarcopterygii (2)
- Megaclass Tetrapoda (893)
- Superclass Pisces
- Phylum Cnidaria (12 578)
- Phylum Ctenophora (184)
- Phylum Cycliophora (2)
- Phylum Dicyemida (122)
- Phylum Echinodermata (7 646)
- Phylum Ectoprocta accepted as Bryozoa
- Phylum Entoprocta (202)
- Phylum Gastrotricha (523)
- Phylum Gnathostomulida (100)
- Phylum Hemichordata (137)
- Phylum Kinorhyncha (348)
- Phylum Loricifera (46)
- Phylum Mesozoa accepted as Dicyemida
- Phylum Mollusca (52 040)
- Phylum Nematoda (6 758)
- Phylum Nematomorpha (5)
- Phylum Nemertea (1 335)
- Phylum Nemertina represented as Nemertea
- Phylum Nemertini accepted as Nemertea
- Phylum Orthonectida (24)
- Phylum Pentastomida accepted as Pentastomida
- Phylum Phoronida (13)
- Phylum Placozoa (4)
- Phylum Platyhelminthes (13 497)
- Phylum Pogonophora accepted as Siboglinidae Caullery, 1914
- Phylum Porifera (9 475)
- Phylum Priapulida (22)
- Phylum Rotatoria accepted as Rotifera
- Phylum Rotifera (219)
- Phylum Sipunculida accepted as Sipuncula
- Phylum Tardigrada (263)
- Phylum Xenacoelomorpha (437)
- Kingdom Archaea (117)
- Kingdom Bacteria (2 223)
- Kingdom Chromista (20 791)
- Kingdom Fungi (1 432)
- Kingdom Monera represented as Bacteria
- Kingdom Plantae (10 581)
- Kingdom Protozoa (766)
- Kingdom Viruses (115)