fish with a cartilaginous, non-bony skeleton (sharks, skates and rays).
Elasmobranchii is the subclass of cartilaginous (with skeleton made of cartilage rather than bone) fishes (class chondrichthyes) that includes skates, rays and sharks. Elasmobranchs have an upper jaw that is not fused to the braincase and separate slitted gill openings.
Describes a group of fish with out a hard bony skeleton, including sharks, skates, and rays.