What are whales?

The humpback whale leaps into the air with his powerful tail pushing him up.

Whales are mammals, are  those who, drink milk from their mothers, have fur or hair, born alive, and breath air. Whales how I said are mammals too, but they have a small differences, they live in water they have to  come to the surface for air and go to water again whales are  not the only mammals that live in the water there are other kinds. Whales are magnificent creatures and they are smart, by the way.