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A hermit crab’s shell is his life sustaining home and his protection from predators and desiccation. Hermit crabs take up residence in discarded gastropod shells and can not make their own shell. “For the vast majority of crustaceans which we call hermit crabs, the behavior patterns by which individuals utilize empty gastropod shells as shelter are critical to the crab’s existence. Orientation to shells, selection of a shell to enter, entry of a shell, and subsequent living the shell are all behaviors which directly affect the Darwinian fitness of an individual crab. Failure to find or efficiently enter a shell at all can rapidly andRead More →