Jawless fish do not have bone, but they do have cartilage. Fish with jaws consist of both the cartilaginous fish and the bony fish.

Do jawless fish have a bony skeleton?

The jawless fishes were the earliest vertebrates. Today there are only about sixty species still living. These fish have no scales. Their skeletons are made of cartilage, a firm, flexible material like the end of your nose.

Do jawless fish have jaws?

Jawless fish are the most primitive fishes living today. Jawless fish: Lack jaws. Feed by suction with the help of a round muscular mouth and rows of teeth.