Question

Endoskeleton of fishes are made up of cartilage and bone; classify the following fishes as cartilagenous or bony 

Torpedo,                         Sting ray,                        Dog fish, 

Rohu,                             Angler fish,                     Exocoetus

Answer 1

Torpedo—Cartilagenous, Sting ray—Cartilagenous, Dog fish— Cartilagenous, Rohu—Bony, Angler fish— Cartilagenous Exocoetus—bony.