How dolphin survive?

Answer 1

A dolphin survives by surfacing to the top of the water to breathe air from their blowhole, catch fish with their teeth and mouth, and live in groups of other dolphins called pods.

Answer 2

the holes on top of their head helps them breathe. when they go out of the water and squirt water, theyre breathing like whales.

They are gregarious, living in family pods, highly intelligent, of the whale family, noted for caring for their ill and injured. If you have every seen performing dolphins you know of their intelligent interactions with human.
Dr. John C. Lilly, Ph.D, was a leading authority on dolphins.

John C. Lilly Homepage