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Sen Otters off the Coast of California 
sea otters off the coast of Californiahave an unusual method of getting food£®They dive to the floor of the sea to find the shell£­fish they like£® 
When an otter brings a shellfish to the surface of the water£¬he floats on his back and puts the shellfish on his chest£®Then the otter digs the meat out of the shell with his teeth£® 
Sea otters are especially fond of shellfish with a very hard shell£®When the otter brings up one of these£¬he also brings a stone£®He puts the stone on his chest£¬holding the shellfish in his front paws£®He takes a wide swing and smashes the hard shell on the stone£®Then he has no trouble getting at the meat in the shell£® 
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