Key To SurvivalEXTRA SHELLS PREVENT FIGHTS
It is always important to have extra shells in your cage.
Because of their soft tail a hermit crab highly values the protection of their shell. They never walk around without a shell unless they are highly stressed. Hermit crabs are always on the search for a better shell. If they do not find an empty on that fits their needs, they attempt to steal a shell from another crab. Having extra, properly sized shells available will help prevent shell robbing.
Shells are sized by their openings, not overall size. Look at the shell your crab is currently in and choose shells that are about the same size and slightly bigger. Hermit crabs grow slowly so a gradual increase in shell size is best. If they are too big the crabs will not try them on. The easiest way to find the right size is to bring your crabs with you when you go shell shopping.