Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Teleostomi
       Class Osteichthyes Huxley, 1880 [paraphyletic] - bony fishes see [unranked] Euteleostomi
         Subclass Actinopterygii Woodward, 1891 - ray-finned fishes see Class Actinopterygii Woodward, 1891
           Infraclass Neopterygii Regan, 1923 see Subclass Neopterygii Regan, 1923
             Division Teleostei Müller, 1845 see Infraclass Teleostei Müller, 1845
               Subdivision Euteleostei Greenwood et al., 1966 see Cohort Euteleosteomorpha (Greenwood et al., 1966)
                 Superorder Acanthopterygii Rosen & Patterson, 1969 see [unranked] Acanthopterygii Rosen & Patterson, 1969
                   Series Percomorpha see Division Percomorphacea Wiley & Johnson, 2010
                     Order Scorpaeniformes Bloch, 1789 - mail-cheeked fishes
                       Suborder Cottoidei Berg, 1940
                         1 Family Cottidae Bonaparte, 1832 - sculpins
                         2 Family Cottocomephoridae see Family Cottidae Bonaparte, 1832
                         3 Family Ereuniidae
                         4 Family Normanichteryidae Carroll, 1988, nom. null. see Family Normanichthyidae
                         5 Family Psychrolutidae - fatheads
                         6 Family Cyclopteridae Bonaparte, 1831
                         7 Family Agonidae Swainson, 1839 - poachers
                         8 Family Comephoridae - Baikal oilfishes