Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Craniata auct.
     Pisces
       Class Actinopterygii Woodward, 1891 - ray-finned fishes see Clade Actinopterygii Woodward 1891 [Moore & Near 2020]
         Order Anguilliformes Berg, 1943 - eels
           01 Family Anguillidae Rafinesque, 1810 - freshwater eels
           02 Family Heterenchelyidae Regan, 1912 - mud eels
           03 Family Moringuidae Gill, 1885 - spaghetti eels
           04 Family Chlopsidae Rafinesque, 1815 - false morays
           05 Family Myrocongridae Gill, 1890 - myroconger eels
           06 Family Muraenidae Rafinesque, 1815 - moray eels
           07 Family Synaphobranchidae Johnson, 1862 - cutthroat eels
           08 Family Ophichthidae Günther, 1870 - snake eels and worm eels
           09 Family Colocongridae Smith, 1976 - shorttail eels
           10 Family Congridae Kaup, 1856 - conger eels
           11 Family Muraenesocidae Kaup, 1859 - pike conger eels
           12 Family Derichthyidae Gill, 1884 - longneck eels
           13 Family Nemichthyidae Kaup, 1859 - snipe eels
           14 Family Serrivomeridae Trewavas, 1932 - sawtooth eels
           15 Family Nettastomatidae Kaup, 1859 - duckbill eels