A communal crab that does better in groups, great climbers they like to explore everything in their enclosure. Provide a substrate of sand or fine gravel and decorate with driftwood or other objects that the crabs can climb and explore. Humidity should be around 70%. A shallow water bowl filled with dechlorinated water should be included with a means for the crab to enter and exit. Put a few spare shells in the tank larger than what your crabs in at the moment and you might be lucky enough to see them move home. An unusual and interesting pet.