Ok, I have not gone digging and I do not think he could get out, but I do not see him. All the possible shells are empty. What I found originally: The molting crab dug down about 1 inch next to the water dish for a few weeks. One morning I get up and see crab#2 holding the molting ones shell like he is about to get in it. The molting crab looks dead, completely out of his shell about an inch next to his exo. When I bend over to look at them, the molter runs buck naked across the big bowl. I set a couple empty shells next to him and left him be. When I got home in the afternoon, all I could find was one crab - I am guessing its crab#2. I have no idea where the molting crab is, as there are 3 empty shells. I do not know if crab#2 stole the molter's shell as they were very similar in size and appearance. I do know crab#2 is far more active and lively now than he has been in a long, long time. Any ideas ? Is it possible to have a living naked crab thats buried ?