Question

Why whales and dolphins often come up to the water surface they even release fountain of water when they move upwards

Answer 1

beacuse the wheal and dolphins are the mamals they cannot take oxygen from the water

Answer 2

Fish use their gills to take oxygen from the water that they live in. But people get the oxygen we need by breathing air, using our lungs. Whales and dolphins use their lungs to breathe air also. That's one reasons why theycome to the surface of the ocean