Fish Taxonomy | MCQs

Explanation

Hagfish belong to Cyclostomes.

Hagfish are jawless fish that are also known as cyclostomes.

They are distinct from both cartilaginous fishes (like sharks) and bony fishes (most other fish). 

Hagfish are marine creatures that possess four hearts.

These hearts pump blood through a series of vessels.

These play a role in maintaining blood pressure and circulation.