[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Pisces
     Class Osteichthyes Huxley, 1880 - bony fishes see [unranked] Euteleostomi
       Order Anguilliformes Rafinesque, 1810 - eels
         Family Ophichthidae Günther, 1870 - snake eels and worm eels
           1 Genus Apterichtus Duméril, 1806
           2 Genus Dalophis Rafinesque, 1810
           3 Genus Echelus Rafinesque, 1810
           4 Genus Ophichthus Ahl, 1789
           5 Genus Ophisurus Lacepède, 1800
           6 Genus Pisodonophis Kaup, 1856