Friday, 26 December 2008

Blue Whale


Blue whale is the largest & loudest animal that ever lived on planet Earth. These enormous mammals eat tiny organisms, like plankton and krill, which they sieve through baleen, the filters that are in place of their teeth. They live in small groups called 'pods.' Blue whales are found throughout the world's oceans.The blue whale's skin is usually blue-gray with white-gray spots. The underbelly has brown, yellow, or gray specks.

Diet
Blue whales are carnivores, although they only eat very tiny things, no bigger than your pinky finger. Their favorite food is krill, or shrimp-like euphausiids, that are up to three inches long. Blue whales must eat two to four tons of krill a day during the feeding season to survive the rest of the year.

Behaviour
They are usually seen solitary or in pairs (mother-calf pairs or two adults), although they may gather in loose groups to feed.Blue whales breathe air at the surface of the water through 2 blowholes located near the top of the head. Its called SPOUTING. They spout (breathe) about 1-4 times per minute at rest, and 5-12 times per minutes after a deep dive. Their blow is a single stream that rises 40-50 feet (12-15 m) above the surface of the water.




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