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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.
 
Cartilaginous -
 
Bony -
Answer variants:
Torpedo, Sting ray, Dog fish
Rohu, Angler fish, Exocoetus