1 Caribbean Land Hermit Crab (Coenobita clypeatus) by Aquatic Arts Hermit crabs are climbers, so driftwood pieces should be added to the terrarium to allow climbing. Place driftwood so that the crabs can't climb out. Since Hermit Crabs live in coastal areas, they require non-metal bowls of de-chlorinated freshwater and marine salt water (no table salt) in which they can submerge but not drown. The bowl should be deep enough for crabs to submerge and get water in their shells, but also easily climb out of the water bowl. Despite the name, hermit crabs are not loners and are known to live in massive groups of up to one hundred crabs! Plenty of extra shells of appropriate size must be provided. Artificial and painted shells must be free of toxic paints and other chemicals. All Aquatic Arts (formerly InvertObsession) brand plants and animals come with a 100% live arrival guarantee, plus free email support directly from the owners!