Which animals live inside empty seashells?

Unlike other crabs, hermit crabs have soft exoskeletons (outer coverings). Their delicate bodies need protection from the harsh elements of undersea life, as well as a place to hide from predators. In order to survive, they crawl into abandoned seashells. The crab’s flexible body allows it to twist and turn into a curved shell, leaving only its claws exposed. A hermit crab will carry the shell on its back as it moves along the ocean floor. When it outgrows its home, it moves on to a larger shell.