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You can see the live snail inside the shell. It’s white, says the National Park Service. The the yellow patch is a hard anatomical structure used like a trap door,. to protect the snail after it pulls ...

Hermit crabs are more than happy to let snails build them a perfect home. Hermit crabs are obsessed with snail shells. These crafty little crabs, found in California's rocky intertidal zone, are more ...