Endoskeleton of fishes are made up of cartilage and bone; classify the following fishes as cartilaginous or bony: Torpedo, Sting ray, Dog fish, Rohu, Angler fish, Exocoetus. [3MARKS]
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Solution
Identification : 0.5 Mark each
Torpedo — Cartilaginous Sting ray — Cartilaginous Dog fish — Cartilaginous Rohu — Bony Angler fish — Cartilaginous Exocoetus — Bony