Question

How do Agnatha fish differ from Osteichthyes fish?

Answer 1

Agnatha fish:

1. Agnatha group of fishes are primitive fishes in which jaws are absent.
2. They lack paired fins on the body and a primitive notochord is present in the larvae and adults.

Osteichthyes fish:

1. Osteichthyes fish are commonly referred to as bony fishes as they are majorly composed of bones.
2. It is the largest class of vertebrates to date.

Agnatha fishes	Osteichthyes fish
1. Agnatha fishes are small and lack paired fins.	1. Osteichthyes fishes have two sets of paired fins and have scales.
2. They are devoid of jaws and have holes for a mouth.	2. Bony fishes contain well-defined jaws.
3. Examples of such fishes are lampreys and hagfish.	3. Examples of this category include west Indian ocean coelacanth and the Queensland lungfish.