All dolphins have teeth but they don't chew their food, they just bite and swallow! Some orcas (killer whales), eat only fish – a favourite being salmon – and others eat much bigger prey including seabirds and mammals such as sea lions.
Dolphins are mammals and breathe air into their lungs, just like we do. Dolphins cannot breathe under water like fish can as they do not have gills. Dolphins breathe through a nostril, called a blowhole, located right on top of their heads.
Dolphins are mammals because they breathe air just like us. They are warm blooded mammals just like humans. Dolphins flap their tail up and down to swim. The fish they eat are a good size for a dolphin.Mar 2, 2015
Dolphin skin is smooth and feels rubbery to the touch. Their skin is smooth because they need to pass cleanly through the water without any drag. Dolphin skin is very sensitive, which means it has a lot of nerve endings in it. Humans have a lot of nerve endings too, especially on our face and hands.