Question

What is special about Agnatha fish?

Answer 1

Agnatha:

1. Agnatha is a superclass of jawless fishes that are paraphyletic.
2. It includes the class Cyclostomata and the extinct class Ostracodermi.

Characteristics of Agnatha fishes:

1. One of the most distinguishing characteristics of the superclass is the lack of jaws.
2. Their skeleton is usually comprised of cartilage and there are no paired fins.
3. The notochord is present in the embryonic stage and the adult life.
4. They just have a single median nostril.
5. They have a suctorial and round mouth.
6. Their body is elongated.