A cartilaginousmarine fish in the subclass Holocephali and especially the order Chimaeriformes, with a blunt snout, long tail, and a spine before the first dorsal fin
“In the living chimaeras, Callorhinchus and Chimaera, the authors were able to show the persisting boundaries between the individual teeth.”
“Like those distant relatives, chimaeras have skeletons of cartilage, not bone.”
“The feature was previously unknown in sharks and other chondrichthyans, an order of fish whose modern descendants include sharks, skates, rays, and chimaeras.”