What are some examples of fish without jaws?

The class Agnatha (according to some a superclass) includes the jawless fish. Examples are the lamprey eel and the hagfish. There are also a few extinct forms in the fossil record. read more

Fish without jaws had more difficulty surviving than fish with jaws, and most jawless fish became extinct. Jaws use linkage mechanisms. These linkages can be especially common and complex in the head of bony fishes, such as wrasses, which have evolved many specialized feeding mechanisms. read more

jawless fish - eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms. read more