Question

How does a sea animal,like dolphin ,survive in water without gills

Answer 1

Unlike fish, Dolphins are marine mammals.

Being mammals they need air to breathe and survive. To breathe in air, they come up to the surface of the water, take in their dose of air and then dive back underwater, and stay inside like a marine creature.

This is the reason why dolphins can survive in water without gills.

Answer 2

Explanation:

They cannot breathe underwater like fish can as they do not have gills. They breathe through nostrils, called a blowhole, located right on top of their heads. This allows them to take breaths by exposing just the top of their heads to the air while they are swimming or resting under the water.