Question

Mention any eight characteristics of class chondrichthyes.

Answer 1

Characteristics of Chondrichthyes:

Any member of the broad group of cartilaginous fishes that includes sharks, skates, rays, and chimaeras is referred to as chondrichthyan (class Chondrichthyes).

1. Placoid (tooth-like) scales cover the skin.
2. The streamlined body aids swimming, while the tail aids propulsion.
3. The skeleton is made entirely of cartilage.
4. The tail has a heterocercal shape.
5. Gills are used for respiration.
6. They have fins to help them swim and balance.
7. The stomach in the digestive system is formed like a J.
8. They are cold-blooded creatures (poikilotherms).