Tuesday, May 5, 2015

51. What clams up in a hurry?


Giant clams live on the Great Barrier Reef. Their huge, hinged shells measure up to 5 feet (1.5 m) wide, and weigh 550 lb (250 kg). The giant clam generally has its shell open so it can feed, but if danger threatens, it can slum the two halves shut. Inquisitive sea creatures had better watch out!

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