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.
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).
Yep. It breathes fresh air, and believe it or not, it DOES have a small portion of hair.
A dolphin is a mammal, hence, it is warm blooded. Fish are cold blooded.
Because dolphins can't breathe underwater they can hold their breath, fish can breathe underwater.
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.
Because they are warmblooded and bear live young.
Dolphins have mammary glands which are found only in mammals. They also reproduce by giving birth instead of laying eggs.
Because they breath air and have hair.
dolphin
There are not any dolphin fish that I know of.
Shark is to fish dolphin is to mammal.
the voice of Dolphin fish is called CLICK .
Neither. A dolphin is a mammal.
I think you are refering to a dolphin fish, and no they arent the same. Dolphin fish are bony fish and dolphins are mammals.
Yes, a dolphin is a secondary consumer in that a dolphin eats fish. These fish often eat plants, making fish the primary consumers.
A dolphin is a mammal.
A dolphin is a mammal.
A dolphin is a mammal.
A "dolphin" is a mammal.
No Dolphon is the National Sea Animal of India. Not National Fish. National Fish is not known