Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812
     Pisces
       Class Actinopterygii Woodward, 1891 - ray-finned fishes
         Order Scorpaeniformes Bloch, 1789 - mail-cheeked fishes
           Suborder Cottoidei Berg, 1940
             01 Family Rhamphocottidae - grunt sculpins
             02 Family Ereuniidae
             03 Family Bathylutichthyidae
             04 Family Cottidae Bonaparte, 1832 - sculpins
             05 Family Cottocomephoridae see Family Cottidae Bonaparte, 1832
             06 Family Comephoridae - Baikal oilfishes
             07 Family Abyssocottidae
             08 Family Hemitripteridae
             09 Family Psychrolutidae - fatheads
             10 Family Agonidae Swainson, 1839 - poachers
             11 Family Cyclopteridae Bonaparte, 1831
             12 Family Liparidae Gill, 1861, nom. cons. - snailfishes