Difference between Agnatha and Gnathostomata are given below:
1. Primitive vertebrates and all aquatic.
2. Jaws are absent.
3. Paired appendages absent.
4. Mouth anterovertebral, circular, funnel like.
5. Head with the lateral eyes.
1. They may be aquatic, terrestrial or aerial.
2. Their jaws are present in the mouth.
3. Presence of paired fines.