Class Actinopterygii Woodward, 1891 - ray-finned fishes
   Subclass Neopterygii Regan, 1923
     Infraclass Teleostei Müller, 1845
       Supercohort Teleocephala de Pinna, 1996
         Clupeocephala
           Cohort Euteleosteomorpha (Greenwood et al., 1966)
             Subcohort Neoteleostei Nelson, 1969
               Infracohort Eurypterygia (Rosen, 1973)
                 Section Ctenosquamata Rosen, 1973
                   Subsection Acanthomorphata (Rosen, 1973)
                     Euacanthomorpha (Johnson & Patterson, 1993)
                       Holacanthopterygii Johnson & Patterson, 1993
                         Acanthopterygii Rosen & Patterson, 1969
                           Euacanthopterygii
                             Division Percomorphacea Wiley & Johnson, 2010
                               Order Cottiformes
                                 Suborder Cottoidei Berg, 1940
                                   Superfamily Cottoidea
                                     01 Family Rhamphocottidae - grunt sculpins
                                     02 Family Ereuniidae
                                     03 Family Cottidae Bonaparte, 1832 - sculpins
                                     04 Family Hemitripteridae
                                     05 Family Agonidae Swainson, 1839 - poachers
                                     06 Family Psychrolutidae - fatheads
                                     07 Family Abyssocottidae
                                     08 Family Comephoridae - Baikal oilfishes
                                     09 Family Cyclopteridae Bonaparte, 1831
                                     10 Family Liparididae nom. van. see Family Liparidae Gill, 1861, nom. cons.
                                     11 ?Family Normanichthyidae
                                     12 ?Family Bathylutichthyidae