Infraphylum [Gnathostomata] Gegenbaur, 1874 - jawed vertebrates see Superclass Gnathostomata Gegenbaur, 1874
   Megaclass Osteichthyes Huxley, 1880 see Clade Osteichthyes Huxley 1880 [Moore & Near 2020]
     Superclass Actinopterygii Woodward, 1891 see Clade Actinopterygii Woodward 1891 [Moore & Near 2020]
       Class Actinopteri Cope, 1871
         Subclass Neopterygii Regan, 1923
           Infraclass Teleostei Müller, 1845 see Division Teleostei Müller, 1845
             Megacohort Elopocephalai Betancur-R et al., 2017 [monotypic]
               Cohort Elopomorpha Greenwood et al., 1966
                 Order Anguilliformes Berg, 1943 - eels
                   01 Family Anguillidae Rafinesque, 1810 - freshwater eels
                   02 Family Congridae Kaup, 1856 - conger eels
                   03 Family Eurypharyngidae Gill, 1883 - gulper eels
                   04 Family Muraenesocidae Kaup, 1859 - pike conger eels
                   05 Family Muraenidae Rafinesque, 1815 - moray eels
                   06 Family Nemichthyidae Kaup, 1859 - snipe eels
                   07 Family Ophichthidae Günther, 1870 - snake eels and worm eels
                   08 Family Saccopharyngidae Bleeker, 1859 - swallower eels
                   09 Family Serrivomeridae Trewavas, 1932 - sawtooth eels
                   10 Family Chlopsidae Rafinesque, 1815 - false morays
                   11 Family Cyematidae Regan, 1912 - bobtail eels
                   12 Family Derichthyidae Gill, 1884 - longneck eels
                   13 Family Heterenchelyidae Regan, 1912 - mud eels
                   14 Family Monognathidae Trewavas, 1937 - onejaw gulpers
                   15 Family Moringuidae Gill, 1885 - spaghetti eels
                   16 Family Myrocongridae Gill, 1890 - myroconger eels
                   17 Family Nettastomatidae Kaup, 1859 - duckbill eels
                   18 Family Protanguillidae Johnson, Ida & Miya, 2012 - primitive cave eels
                   19 Family Synaphobranchidae Johnson, 1862 - cutthroat eels