Classification of fishes

Phyllum – Chordata

Sub phylum – Craniata

Division – Gnathostomata

Super class – Pisces

• The Super class Pisces are aquatic Gnathostomes having gills as the respiratory organs and fins for locomotion.
• These are divided into seven classes: Pterichthys, Coccostei, Acanthodii, Elasmobranchii, Holocephali, Dipnoi and Teleostomi.
• Of these, the first three classes are completely extinct and are collectively called as Placoderms.