Asked in Whales

Are whales and dophins considered to be true mammals?


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Yes. They are cetaceans and are not considered fish. They are warm-blooded, air breathing (through a blowhole), that give birth to live young that nurse from milk produced by the mother -- all characteristics that categorize them as mammals. And yes, they do have a bit of hair or fur, another thing that classifies them as mammals. Whales typically lose theirs after birth while most dolphins have a bit around their blowholes for life.