Question

Name two aquatic animals which have no gills.

Answer 1

Hint:Warm blooded creatures and inhale air into their lungs, much the same as we do. They can't inhale submerged like fish can as they don't have gills. They inhale through nostrils, called a blowhole, found right on the head of their heads.

Complete answer:
Two types aquatic animals which doesn’t have gills are
>Dolphins
>Whales
Dolphins and whales breathing function- 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. After each breath, the blowhole is sealed tightly by strong muscles that surround it, so that water cannot get into the whale or dolphin’s lungs. When a dolphin surfaces for air, he breathes out (exhales) first and then breathes in (inhales) fresh air; it only takes a fraction of a second for the dolphin to do this. If you are close by, it is easy to hear a dolphin’s ‘blow’ at the surface; in fact you will often hear a dolphin before you see him! The blow is the sound you hear, and the spray of water you see, when the dolphin forcefully breathes out and clears away any water resting on top of his blowhole. The water spray is not coming from the dolphin’s lungs; it is just water sitting on top of its head around the blowhole being blown away before he inhales. The two aquatic animals which have no gills are dolphins and whales. These animals must come to the surface in order to breathe as they cannot breathe underwater without gills.

Note:It is really uncommon for a marine warm-blooded creature to "suffocate," as they won't breathe in submerged; yet they do choke from an absence of air. Being brought into the world submerged can mess up infant whale and dolphin calves.