But then they have to come up for air because they are mammals, not fish. They breathe through their blowholes at the top of their necks. They also have these cool things in their heads called an echolocating system. They use this system like radar. It comes out of the middle of their foreheads, and it goes out and bounces back to them, giving them a picture of what they aimed at.
Dolphins are also great in the water.
They really know how to impress humans. They can put on quite a show. Then they dive deep into the water and come shooting out like a gray missle into the air again. It's really neat. So, that's my site.