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 Ophidiiformes Regan, 1912 - cusk-eels
           1 Family Ophidiidae Rafinesque, 1810 - cusk-eels
           2 Family Carapidae Poey, 1867, nom. protect., nom. praeval. - pearlfishes
           3 Family Bythitidae Gill, 1861 - viviparous brotulas
           4 Family Aphyonidae Jordan & Evermann, 1898 - aphyonids see Family Bythitidae Gill, 1861
           5 Family Parabrotulidae Nielsen, 1968 - false brotulas see Family Bythitidae Gill, 1861