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They use it to break open the shells of shellfish - their staple diet. When they find a scallop or oyster, they float on their backs with the food on their stomach. They then pound the shell with the stone to break it open - so they can get at the soft-bodied animal inside.

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8y ago
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9y ago

they use it to crack open shellfish, which is a big part of their diet.

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Q: Why do sea otters always carry a stone with them?
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