What is the difference between Cartilaginous Fish and Bony Fish?

Cartilaginous Fish Elasmobranchii:

1. Endoskeleton is cartilaginous.

2. Mouth is ventral in position.

3. Operculum is absent.

4. Caudal fin is heterocercal.

5. Body covered with placoid scales.

6. Pelvic fins are modified into intromittant organs in males called claspers.

E.g. Scoliodon, Torpedo, saw fish.

Bony Fish Teleostomi:-

1. Endoskeleton is bony.

2. Mouth is terminal or sub-terminal in position.

3. Operculum is present.

4. Caudal fin is homocercal.

5. Body covered with cycloid, ctenoid, rhomboid scales.

6. Claspers are absent.

E.g. Labeo, Clarius, Anabas, Catla.