Question

Give characteristics of Petromyzon. Comment on its
mode of nutrition.​

Answer 1

The sea lamprey has an eel-like body without paired fins. sharp teeth are arranged in many consecutive circular rows. There are 7 branchial or gill-like openings behind the eye.

Answer 2

$\huge\underline{\underline\mathtt{Answer:-}}$

1) Petromyzon belongs to class cyclostomata have round, suctorial mouth and Division Agnatha in which true jaws are lacking

2) Petromyzon are commonly called as lampreys.

3) Soft skin, smooth with unicellular mucus glands, scales absent.

4) Median fins present, paired fins absent.

5) They are ectparasitic that is depend on the body of large fishes, other animals for food.