Why a dolphin is not a fish?

Answer 1

Because it is. There's not really a "why".

If you mean "what are the characteristics of a dolphin that show that it's a mammal and not a fish or amphibian", it's warm-blooded, produces milk, and gives birth to live young.

Answer 2

They bear live young, which are suckled on milk from MAMMARY glands. Dolphins and Whales have nipples, just like you and me. They also warm-blooded, have a smooth hairy skin and are air breathing (no gills).

Answer 3

Yep. It breathes fresh air, and believe it or not, it DOES have a small portion of hair.

Answer 4

A dolphin is a mammal, hence, it is warm blooded. Fish are cold blooded.

Answer 5

Because dolphins can't breathe underwater they can hold their breath, fish can breathe underwater.

Answer 6

A dolphin is not a fish because it is warm blooded just like you and me. It is a mammal, and gives birth to it's live offspring.

Answer 7

Because they are warmblooded and bear live young.

Answer 8

Dolphins have mammary glands which are found only in mammals. They also reproduce by giving birth instead of laying eggs.

Answer 9

Because they breath air and have hair.