Question

How the skin is covered in class Chondrichthyes?

Answer 1

Chondrichthyes:

1. Chondrichthyes are a group of cartilaginous fishes, which includes sharks, skates, and rays.
2. It belongs to the Phylum Chordata.
3. Placoid scales cover the skin, which is a tooth-like scale.
4. These are the tooth-like projections and the size of the scale does not increase as the fish grows.
5. They are also known as denticles. It helps in the protection and can even be used to injure or kill prey. It also helps in streamlining.
6. The mouth is positioned ventrally.