I got 4 hermit crabs in my tank. This morning I saw what seems to be a dead hermit crab, but when I counted my crabs there are still 4 hermit crabs although 1 is more inactive than the other 3. My question is do hermit crab shed their skin? If they do, what do I have to do with the dead skin? Shall I remove it from the tank or just allow it to be consume by the other inhabitants. Thanks again.