cartilaginous fish, chondrichthian - fishes in which the skeleton may be calcified but not ossified

Elasmobranchii, Selachii, subclass Elasmobranchii, subclass Selachii - sharks; rays; dogfishes; skates

shark - any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough skin covered with small toothlike scales

ray - cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins