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| Whale are big sea mammals well
built for living in the water. A thick layer of fat called blubber keeps out
the cold.
A whale's body is shaped for easy swimming. Its front limbs are shaped as flippers. It
also has a broad tail flattened from top to bottom, not from side to side like a fish
tail. Unlike fish, whales must swim to the surface to breathe. Before breathing in, they blow out stale air through a blowhole, or two slits on top of the head. Baby whales are born in water. As soon as they are born they swim up to take a breath. There are two groups of whales. Toothed whales like the dolphin mostly catch fish. But killer whales are toothed whales that attack seals, penguins and other whales. Baleen whales are the other main group of whales. Baleen whales include the gigantic Blue whale. |
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