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Whales are big aquatic animals. However, they are mammals. There are different types of whales. The biggest one is blue whale. It is the largest animal on Earth. Whales make sounds to communicate. Whales live in all the oceans across the Earth. Population of whales is affected by climate change.  Whales like to jump high and meet people. However, some people hunt whales for their meat.

Whales are group of fully aquatic placental marine mammals.
They breathe air into lungs and feed their young milk .
Their diet can range from microscopic plankton to large marine mammals.
Whales  live alone or in groups called pods.
They can swim very quiсkly and spring out high out of the water.
Whales also communicate with each other using melodic sounds.