Question

Why scolidon known as dog fish?

Answer 1

scolidon , cartillagenous fish has mouth like dog which has following features :_body is covered by minute placoid scales or dermal denticles .

intestine has a spiral Valve or scroll valve . alimentary canal opens out by cloaca .

caudal fin is heterocercal i.e, it has two unequal lobes . the dorsal lobe is large and the ventral lobe is small

due to protruded snout its face look's like that of dog .......

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hope it help you....✌️✌️✌️✌️

Answer 2

cartilagenous fish has mouth like dog which has following features :Body is covered by minute placoid scales or dermal denticles. Intestine has a spiral valve or scroll valve. Alimentary canal opens out by cloaca.