Provide new, clean and larger shells for crabs to move into. Hermit crabs have claws that can pinch. Hold the crab carefully by the shell. Keep the crab's home clean. Crabs eat at night and bury their food.
Crabs normally live in groups.
Its good to keep more than one as a pet. Never try to pull a crab from its shell. They will give up their life before they give up their home.