Question

Common name of Petromyzon is:

• A. Lancet
• B. Hagfish
• C. Acornworm
• D. Lamprey

Answer 1

The correct option is D Lamprey

Sea Lamprey or Petromyzon belong to the group Cyclostomata.

Cyclostomata is the modified and degenerate offshoot of the primitive vertebrate stalk. Due to their circular mouth, they are named Cyclostomata.

They are parasitic, usually feeding on fish in their adult stage. Morphologically, they resemble eels. They are known to be the only living vertebrates without true jaws, hence called Agnatha.

Cyclostomata includes hagfishes (Myxine) and lampreys (Petromyzon).

So, the correct answer is 'Lamprey'.