HERMIT CRABS USE OR "WEAR" EMPTY MARINE GASTROPOD SHELLS THROUGHOUT THEIR LIFESPAN, IN ORDER TOO PROTECT THEIR SOFT ABDOMENS, AND IN ORDER TO HAVE A STRONG SHELL TO WITHDRAW INTO IF ATTACKED BY A PREDATOR. EACH INDIVIDUAL HERMIT CRAB IS FORCED TO FIND ANOTHER GASTROPOD SHELL ON A REGULAR BASIS, WHENEVER IT GROWS TOO LARGE FOR THE ONE IT IS CURRENTLY USING.
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