Phylum Chordata

Superclass Agnatha (jawless fishes: hagfish and lampreys)

Superclass Gnathostomata (jawed fishes)

Class Chondicthyes (cartilagenous fishes)

Subclass Elasmobrachii (sharks and rays)

Class Osteichthyes (bony fishes)

Subclass Dipneusti (lungfishes)

Subclass Crossopterygii (lobe-finned fishes: coelacanth)

Subclass Actinopterygii (ray-finned fishes)

Infraclass Chondrostei (sturgeons and paddlefish)

Infraclass Holostei (gars and bowfin)

Infraclass Teleostei (modern bony fishes)

Division Archaeophylaces (primitive teleosts: bony tongues and morymids)

Division Taeniopaedia (herrings, eels, and tarpon)

Division Euteleostei (advanced teleosts)

Superorder Protacanthopterygii (trout and salmon)

Superorder Ostariophysi (minnows and catfish)

Superorder Paracanthopterygii (cod)

Superorder Acanthopterygii (spiny rayed fishes: perch, etc.)