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

Classification of fishes based on endoskeleton:

1. Bony fish have skeletons primarily made of bone, whereas cartilaginous fish have skeletons primarily made of cartilage. Additionally, these two forms of fish belong to separate taxonomic groups.
2. All bony fish belong to the superclass Osteichthyes, whereas cartilaginous fish are classified under the class Chondrichthyes.

The fishes are classified as follows:

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