Apr 3, But it's time to accept that whales and dolphins have hair. The boto dolphin does actually keep its hairy snout its whole life, according to the. Dolphins are mammals, not fish. Also, like all mammals, dolphins even have a tiny amount of hair, right around the blowhole. Whales and porpoises are also. As you may know, dolphins are mammals. One of the defining characteristics of all mammal species is that they have hair on their bodies. But, what ab. All mammals have hair at some point in their life and cetaceans are no exception. Although lost before or shortly after birth, tiny hairs are found around the tip of. Jul 21, If Dolphins Are Mammals and All Mammals Have Hair, Why Aren't Dolphins But why does catnip, as opposed to any other plant, have such a. All mammals have hair. We are mammals and dolphins are too. How do dolphins pass this mammal test? Some say dolphins have whiskers: can this be true?.