Whales hold several world records. Whales are the largest aquatic mammals (bigger than sharks or dolphins.) Grey whales migrate further than any other mammal (about 10,000 miles a year.) And the blue whale is the earth’s largest animal (even beating out the elephant.) A blue whale can grow to hundred feet long and weigh up to 150 tons. Can you imagine a whale as long as a ten-story building is tall?
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