ウツボ属

食用魚を含むウナギ科、アナゴ科、ハモ科などがいる。細長い。古くは無足類とよばれ化石種を除く現生すべての種は腹鰭がない。
Family Anguillidae Rafinesque, 1810／Freshwater eel／ウナギ科／海水・淡水域
Family Chlopsidae Rafinesque, 1815／False morays／イワアナゴ科／海水域
Family Colocongridae Smith, 1976
Family Congridae Kaup, 1856／Conger eel／アナゴ科／海水域
Family Derichthyidae Gill, 1884／Longneck eel／ヘラアナゴ科／深海域
Family Heterenchelyidae Regan, 1912
Family Moringuidae Gill, 1885／Spaghetti eel／ハリガネウミヘビ科／淡水・汽水域
Family Muraenesocidae Kaup, 1859／Pike eel／ハモ科／海水域
Family Muraenidae Rafinesque, 1815／Moray eel／ウツボ科／海水域
Family Myrocongridae Gill, 1890／Myroconger eel／ヒレウツボ科／海水域。希種
Family Nemichthyidae Kaup, 1859／Snipe eel／シギウナギ科／深海域
Family Nettastomatidae Kaup, 1859／Duckbill eel／クズアナゴ科／海水生
Family Ophichthidae Günther, 1870／Snake eel／ウミヘビ科／海水域で少ないながら淡水域にいる種もいる。
Family Protanguillidae Johnson, Ida & Miya, 2012
Family Serrivomeridae Trewavas, 1932／Sawtooth eel／ノコバウナギ科／深海域
Family Synaphobranchidae Johnson, 1862／Cutthroat eel／ホラアナゴ科／深海域

Subfamily/Muraeninae Rafinesque, 1815／ウツボ亜科
Genus Echidna Forster, 1788／アラシウツボ属
Genus Enchelycore Kaup, 1856／コケウツボ属
Genus Gymnomuraena Lacepède, 1803／ゼブラウツボ属
Genus Gymnothorax Bloch, 1795／ウツボ属
Genus Muraena Linnaeus, 1758／トラウツボ属
Genus Pseudechidna Bleeker, 1863／モヨウタケウツボ属
Genus Rhinomuraena Garman, 1889／ハナヒゲウツボ属
Genus Strophidon McClelland, 1844／タケウツボ属
Subfamily/Uropterygiinae Fowler, 1925／キカイウツボ亜科
Genus Anarchias Jordan & Starks, 1906 ／タカマユウツボ属
Genus Scuticaria Jordan & Snyder, 1901／キカイウツボ属
Genus Uropterygius Rüppell, 1838／アミキカイウツボ属

世界中に140種。
Species Gymnothorax afer Bloch, 1795
Species Gymnothorax albimarginatus (Temminck & Schlegel, 1846)／ヘリシロウツボ
Species Gymnothorax andamanensis Mohapatra, Kiruba-Sankar, Praveenraj & Mohanty, 2019
Species Gymnothorax angusticauda (Weber & de Beaufort, 1916)
Species Gymnothorax angusticeps (Hildebrand & Barton, 1949)
Species Gymnothorax annasona Whitley, 1937
Species Gymnothorax annulatus Smith & Böhlke, 1997
Species Gymnothorax atolli (Pietschmann, 1935)
Species Gymnothorax aurocephalus Nashad, Mohapatra, Varghese, Ramalingam, Bineesh & Mohanty, 2020
Species Gymnothorax australicola Lavenberg, 1992
Species Gymnothorax austrinus Böhlke & McCosker, 2001
Species Gymnothorax bacalladoi Böhlke & Brito, 1987／和名なし
Species Gymnothorax baranesi Smith, Brokovich & Einbinder, 2008
Species Gymnothorax bathyphilus Randall & McCosker, 1975
Species Gymnothorax berndti Snyder, 1904／ハワイウツボ
Species Gymnothorax breedeni McCosker & Randall, 1977／ハチモンジウツボ
Species Gymnothorax buroensis (Bleeker, 1857)／サンゴウツボ
Species Gymnothorax castaneus (Jordan & Gilbert, 1883)
Species Gymnothorax castlei Böhlke & Randall, 1999
Species Gymnothorax cephalospilus Böhlke & McCosker, 2001
Species Gymnothorax chilospilus Bleeker, 1864／ミナミウツボ
Species Gymnothorax chlamydatus Snyder, 1908／クルマウツボ
Species Gymnothorax chlorostigma (Kaup, 1856)／ハナビラウツボ
Species Gymnothorax conspersus Poey, 1867
Species Gymnothorax cribroris Whitley, 1932
Species Gymnothorax davidsmithi McCosker & Randall, 2008
Species Gymnothorax dovii (Günther, 1870)
Species Gymnothorax elaineheemstrae Sithole, Smith, Mwale & Gouws, 2020
Species Gymnothorax elegans Bliss, 1883／オキナワノコギリウツボ
Species Gymnothorax emmae Prokofiev, 2010
Species Gymnothorax enigmaticus McCosker & Randall, 1982／シマウツボ
Species Gymnothorax equatorialis (Hildebrand, 1946)
Species Gymnothorax eurostus (Abbott, 1860)
Species Gymnothorax eurygnathos Böhlke, 2001
Species Gymnothorax favagineus Bloch & Schneider, 1801
Species Gymnothorax fimbriatus (Bennett, 1832)／ヘリゴイシウツボ
Species Gymnothorax flavimarginatus (Rüppell, 1830)／ゴマウツボ
Species Gymnothorax flavoculus (Böhlke & Randall, 1996)
Species Gymnothorax formosus Bleeker, 1864
Species Gymnothorax funebris Ranzani, 1839
Species Gymnothorax fuscomaculatus (Schultz, 1953)／スズランヒメウツボ
Species Gymnothorax gracilicauda Jenkins, 1903
Species Gymnothorax griseus (Lacepède, 1803)
Species Gymnothorax hansi Heemstra, 2004
Species Gymnothorax hepaticus (Rüppell, 1830)
Species Gymnothorax herrei Beebe & Tee-Van, 1933
Species Gymnothorax hubbsi Böhlke & Böhlke, 1977
Species Gymnothorax indicus Mohapatra, Ray, Smith & Mishra, 2016
Species Gymnothorax intesi (Fourmanoir & Rivaton, 1979)／ミナミミゾレウツボ
Species Gymnothorax isingteena (Richardson, 1845)／ニセゴイシウツボ
Species Gymnothorax javanicus (Bleeker, 1859)／ドクウツボ
Species Gymnothorax johnsoni (Smith, 1962)
Species Gymnothorax kidako (Temminck & Schlegel, 1846)／ウツボ
Species Gymnothorax kolpos Böhlke & Böhlke, 1980
Species Gymnothorax kontodontos Böhlke, 2000
Species Gymnothorax longinaris Allen, Erdmann & Sianipar, 2018
Species Gymnothorax longinquus (Whitley, 1948)
Species Gymnothorax maderensis (Johnson, 1862)
Species Gymnothorax mareei Poll, 1953
Species Gymnothorax margaritophorus Bleeker, 1864／シンジュウツボ
Species Gymnothorax marshallensis (Schultz, 1953)
Species Gymnothorax mccoskeri Smith & Böhlke, 1997
Species Gymnothorax megaspilus Böhlke & Randall, 1995
Species Gymnothorax melanosomatus Loh, Shao & Chen, 2011
Species Gymnothorax melatremus Schultz, 1953／ヒメウツボ
Species Gymnothorax meleagris (Shaw, 1795)／ワカウツボ
Species Gymnothorax microstictus Böhlke, 2000
Species Gymnothorax miliaris (Kaup, 1856)
Species Gymnothorax minor (Temminck & Schlegel, 1846)／アミウツボ
Species Gymnothorax mishrai Ray, Mohapatra & Smith, 2015
Species Gymnothorax moluccensis (Bleeker, 1864)
Species Gymnothorax monochrous (Bleeker, 1856)／ヤミウツボ
Species Gymnothorax monostigma (Regan, 1909)
Species Gymnothorax mordax (Ayres, 1859)
Species Gymnothorax moringa (Cuvier, 1829)
Species Gymnothorax mucifer Snyder 1904／タカノハウツボ
Species Gymnothorax nasuta de Buen, 1961
Species Gymnothorax neglectus Tanaka, 1911／ミゾレウツボ
Species Gymnothorax nigromarginatus (Girard, 1858)
Species Gymnothorax niphostigmus Chen, Shao & Chen, 1996／ワタユキウツボ
Species Gymnothorax nubilus (Richardson, 1848)
Species Gymnothorax nudivomer (Günther, 1867)／アデウツボ
Species Gymnothorax nuttingi Snyder, 1904
Species Gymnothorax obesus (Whitley, 1932)
Species Gymnothorax ocellatus Agassiz, 1831
Species Gymnothorax odishi Mohapatra, Mohanty, Smith, Mishra & Roy, 2018
Species Gymnothorax panamensis (Steindachner, 1876)
Species Gymnothorax parini Collette, Smith & Böhlke, 1991
Species Gymnothorax paucivertebralis Allen, Erdmann & Sianipar, 2018
Species Gymnothorax phalarus Bussing, 1998
Species Gymnothorax pharaonis Smith, Bogorodsky, Mal & Alpermann, 2019
Species Gymnothorax phasmatodes (Smith, 1962)／シノビウツボ
Species Gymnothorax philippinus Jordan & Seale, 1907
Species Gymnothorax pictus (Ahl, 1789)／アセウツボ
Species Gymnothorax pikei Bliss, 1883
Species Gymnothorax pindae Smith, 1962／ノコギリウツボ
Species Gymnothorax poikilospilus Chen & Huang, 2022
Species Gymnothorax polygonius Poey, 1875
Species Gymnothorax polyspondylus Böhlke & Randall, 2000
Species Gymnothorax polyuranodon (Bleeker, 1854)／コクハンカワウツボ
Species Gymnothorax porphyreus (Guichenot, 1848)
Species Gymnothorax prasinus (Richardson, 1848)
Species Gymnothorax prionodon Ogilby, 1895
Species Gymnothorax prismodon Böhlke & Randall, 2000
Species Gymnothorax prolatus Sasaki & Amaoka, 1991
Species Gymnothorax pseudoherrei Böhlke, 2000／ハナジロウツボ
Species Gymnothorax pseudomelanosomatus Loh, Shao & Chen, 2015
Species Gymnothorax pseudoprolatus Smith, Hibino & Ho, 2018／チャイロウツボ
Species Gymnothorax pseudothyrsoideus (Bleeker, 1853)／アミメウツボ
Species Gymnothorax pseudotile Mohapatra, Smith, Ray, Mishra & Mohanty, 2017
Species Gymnothorax punctatofasciatus Bleeker, 1863
Species Gymnothorax punctatus Bloch & Schneider, 1801
Species Gymnothorax randalli Smith & Böhlke, 1997
Species Gymnothorax reevesii (Richardson, 1845)／マメウツボ
Species Gymnothorax reticularis Bloch, 1795
Species Gymnothorax richardsonii (Bleeker, 1852)／モバウツボ
Species Gymnothorax robinsi Böhlke, 1997
Species Gymnothorax rueppelliae (McClelland, 1844)／クラカケウツボ
Species Gymnothorax ryukyuensis Hatooka, 2003／リュウキュウウツボ
Species Gymnothorax sagenodeta (Richardson, 1848)
Species Gymnothorax sagmacephalus Böhlke, 1997／クロエリウツボ
Species Gymnothorax saxicola Jordan & Davis, 1891
Species Gymnothorax serratidens (Hildebrand & Barton, 1949)
Species Gymnothorax shaoi Chen & Loh, 2007／タピオカウツボ
Species Gymnothorax smithi Sumod, Mohapatra, Sanjeevan, Kishor & Bineesh, 2019
Species Gymnothorax sokotrensis Kotthaus, 1968
Species Gymnothorax steindachneri Jordan & Evermann, 1903
Species Gymnothorax taiwanensis Chen, Loh & Shao, 2008
Species Gymnothorax tamilnaduensis Kodeeswaran, Kantharajan, Mohapatra, Ajith Kumar & Kumar Sarkar, 2023
Species Gymnothorax thyrsoideus (Richardson, 1845)／サビウツボ
Species Gymnothorax tile (Hamilton, 1822)
Species Gymnothorax undulatus (Lacepède, 1803)／ナミウツボ
Species Gymnothorax unicolor (Delaroche, 1809)
Species Gymnothorax vagrans (Seale, 1917)
Species Gymnothorax verrilli (Jordan & Gilbert, 1883)
Species Gymnothorax vicinus (Castelnau, 1855)
Species Gymnothorax vietnamensis Smith, Hibino & Ho, 2018
Species Gymnothorax visakhaensis Mohapatra, Smith, Mohanty, Mishra & Tudu, 2017
Species Gymnothorax walvisensis Prokofiev, 2009
Species Gymnothorax woodwardi McCulloch, 1912
Species Gymnothorax ypsilon Hatooka & Randall, 1992／オキノシマウツボ
Species Gymnothorax zonipectis Seale, 1906 ／ヒレオビウツボ