Which one of the following pairs belongs to cartilaginous fish ? (a)Shark and Tuna (b)Shark and Ray (c)Skates and Hilsa (d)Ray and Eel
Option B) Chondrichthyes or cartilaginous fishes are jawed fish with paired fins, paired nares, scales, a twochambered heart, and skeletons made of cartilage rather than bone. The cartilaginous fish are so named because their skeleton is composed of cartilage which is not reinforced by the minerals that make bone. It includes elasmobranchs: sharks, rays and skates, etc.
