Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
     Pisces
       Class Actinopterygii Woodward, 1891 - ray-finned fishes
         Order Salmoniformes Rafinesque, 1810 - trouts
           Family Alepocephalidae - slickheads
           Family Argentinidae Bonaparte, 1838 - argentines
           Family Bathylagidae - deepsea smelts see Subfamily Bathylaginae
           Family †Bernardichthyidae
           Family Esocidae Rafinesque, 1815 - pikes
           Family Galaxiidae - galaxiids
           Family Lepidogalaxiidae - salamanderfishes see Subfamily Lepidogalaxiinae
           Family Leptochilichthyidae - leptochilichthyids
           Family Microstomatidae
           Family Opisthoproctidae - spookfishes
           Family Osmeridae Regan, 1913 - smelts
           Family †Pattersonellidae
           Family Platytroctidae - tubeshoulders
           Family Plecoglossidae - ayu fishes see Subfamily Plecoglossinae
           Family Retropinnidae - New Zealand smelts
           Family Salangidae - icefishes see Tribe Salangini
           Family Salmonidae Regan, 1914
           Family Umbridae Günther, 1866 - mudminnows see Family Esocidae Rafinesque, 1815