Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Craniata Linnaeus, 1758 see Subphylum Vertebrata Cuvier, 1812
     Pisces
       Class Actinopterygii Woodward, 1891 - ray-finned fishes
         01 Order Polypteriformes - bichirs
         02 Order Acipenseriformes Berg, 1940 - sturgeons
         03 Order Lepisosteiformes Hay, 1929 - gars
         04 Order Amiiformes Hay, 1829 - bowfins
         05 Order Osteoglossiformes Berg, 1940 - bonytongues
         06 Order Elopiformes Gosline, 1960 - tenpounders
         07 Order Albuliformes Greenwood et al., 1966 - bonefishes
         08 Order Notacanthiformes Goodrich, 1909 - spiny eels
         09 Order Anguilliformes Rafinesque, 1810 - eels
         10 Order Saccopharyngiformes - sackpharynx fishes see Suborder Saccopharyngoidei
         11 Order Clupeiformes Rafinesque, 1810 - herrings
         12 Order Gonorynchiformes Regan, 1909 - milkfishes
         13 Order Cypriniformes Rafinesque, 1810 - carps
         14 Order Characiformes Goodrich, 1909 - characins
         15 Order Siluriformes Rafinesque, 1810 - catfishes
         16 Order Gymnotiformes Rafinesque, 1810 - American knifefishes
         17 Order Esociformes Rafinesque, 1810 - pikes see Suborder Esocoidei Rafinesque, 1810
         18 Order Osmeriformes - freshwater smelts see Suborder Osmeroidei
         19 Order Salmoniformes Rafinesque, 1810 - trouts
         20 Order Stomiiformes Rosen, 1973 - dragonfishes see Order Stomiatiformes Rosen, 1973, orth. inval.
         21 Order Ateleopodiformes Berg, 1937 - jellynose fishes
         22 Order Aulopiformes Rosen, 1973 - lizardfishes
         23 Order Myctophiformes Regan, 1911 - lanternfishes
         24 Order Lampriformes - opahs see Order Lampridiformes Goodrich, 1909, orth. inval.
         25 Order Polymixiiformes Lowe, 1838 - beardfishes
         26 Order Percopsiformes Berg, 1937 - trout-perches
         27 Order Gadiformes Rafinesque, 1810 - cods
         28 Order Ophidiiformes Rafinesque, 1810 - cusk-eels
         29 Order Batrachoidiformes Berg, 1937 - toadfishes
         30 Order Lophiiformes Rafinesque, 1810 - anglerfishes
         31 Order Gobiesociformes Gill, 1872
         32 Order Atheriniformes Rosen, 1964 - silversides
         33 Order Cyprinodontiformes Berg, 1940 - killifishes
         34 Order Beloniformes Berg, 1937 - needlefishes
         35 Order Stephanoberyciformes Berg, 1937 - pricklefishes
         36 Order Beryciformes Günther, 1880 - alfonso squirrelfishes
         37 Order Cetomimiformes see Superfamily Cetomimoidea
         38 Order Zeiformes Rafinesque, 1810 - dories
         39 Family Elassomatidae - pygmy sunfishes
         40 Order Gasterosteiformes Gill, 1872 - sticklebacks
         41 Order Syngnathiformes Berg, 1940 see Suborder Syngnathoidei
         42 Order Synbranchiformes - swamp eels
         43 Order Scorpaeniformes Bloch, 1789 - mail-cheeked fishes
         44 Order Perciformes Rafinesque, 1810 - perches
         45 Order Pleuronectiformes Bleeker, 1859 - flatfishes
         46 Order Tetraodontiformes Berg, 1937 - plectognaths