Answer:
Fishes are typically divided into three groups: superclass Agnatha (jawless fishes), class Chondrichthyes (cartilaginous fishes), and superclass Osteichthyes (bony fishes).
Explanation:
Hagfish are very primitive fish.
Lampreys
Like hagfish, lampreys also lack scales, but they have fins and a partial backbone.
Ray-finned fish include the majority of living fish species, including goldfish, tuna, salmon, perch, and cod.
Lobe-finned fish are currently far fewer in number than ray-finned fish.
