Question

The endoskeleton of fishes is made up of cartilage and bone. Classify the following fishes as cartilaginous or bony:

Torpedo, Sting ray, Dogfish, Rohu, Angler fish, Exocoetus.

Answer 1

Endoskeleton:

1. Endoskeleton is an internal skeleton present in the bony or cartilaginous fishes.
2. The cartilaginous fish's endoskeleton is composed of cartilage.
3. The bony fish's endoskeleton is mainly of bones.
4. Cartilaginous fish come under the class Chondrichthyes and all bony fish under the class Osteichthyes.

The classification of fishes is as follows:

1. Torpedo – Cartilaginous
2. Sting ray – Cartilaginous
3. Dogfish – Cartilaginous
4. Rohu – Bony
5. Angler fish – Bony
6. Exocoetus – Bony