Fish belonging to the class Chondrichthyes, which includes sharks, rays, and chimaeras, characterized by having a skeleton made of cartilage rather than bone. Parts other than teeth are rarely fossilized. See also bony fishes. See also
Fish belonging to the class Chondrichthyes, which includes sharks, rays, and chimaeras, characterized by having a skeleton made of cartilage rather than bone. Parts other than teeth are rarely fossilized. See also bony fishes. See also