Blue Whales

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BLUE WHALES Some fantastic facts about the world’s largest creatures. Students of the 10 th form Teacher: Levkovich E.V. Petropavlovsk-Kamchatsky

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The blue whale is the largest mammal in the world and the largest animal ever known to have lived on our planet.

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It’s six times longer than a giraffe.

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Its heart is as large as a car.

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Its tongue along can weigh as much as an elephant.

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Female blue whales are larger than males. They can be more than 80 metres long and weigh 200 tons.

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Baby whales weigh is about two tons when they are born and gain about 90 kilograms every day during the first year of their lives.

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The blue whale was named for its colour, a bluish-grey, that looks true blue under the water and greyish on the surface.

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Blue whales live in all the world’s oceans. They often spend summers in polar waters and migrate towards the Equator when winter arrives. They often swim in small groups or alone.

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Blue whales are able to breathe air, but they are very comfortable in the ocean water.

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Blue whales prefer to swim slowly, but they can reach speeds of over 30 kilometres an hour.

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These giant creatures feed on tiny shrimplike animals called krill. An adult blue whale can eat 4 tons of krill a day.

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Blue whales are among the world’s longest-lived animals. They can live to be about 110 years old.

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Blue whales are among the loudest animals on the planet. Their calls are so loud that they can hear each other up to 1600 kilometres away. However, some of their loud sounds are so low in frequency that people cannot hear them without special equipment. Scientists think that blue whales use these calls to communicate with each other.

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Only a few thousand blue whales are believed to swim the world’s oceans. They are one of the most endangered species in the world. They were hunted for many years for their oil, and they were almost hunted to extinction.

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In 1929 and 1930, for example, whalers managed to kill 30000 Antarctic blue whales.

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The mammals became a protected species in the 1960s. Today, they seem to be growing in numbers. But although it’s good news, scientists know, they’re not out of danger yet.