Describe Class Cephalaspidormorphi
This is the lampreys
Characteristics: jawless, cartilaginous, skeleton, and gills
Describe class myxini
This is the Hagfishes;
Characteristics: Jawless, cartilaginous, skeleton and gills
Describe class Chindrichthyes
This is the sharks, skates and rays.
Characteristics: jaws, cartilaginous, skeleton, paired fins, gills, scales, internal fertilization
Describe class Osteichthyes
This is the lobe finned fishes an ray finned fishes
Characteristics: jaws, bony skeletons, paired fins, gills, scales and swim bladder