Anyway, the one in the new shell is probably about a golfball size, maybe a little bit bigger. He's always been kinda docile, never usually moves much just kinda sits around in his little hut. Never see him active, as apposed to the other one which is always making some sort of trouble.

About a week and a half ago, he dug himself up under his hut. Haven't seen him since and I don't know what to think of it. There is about 7in of sand and a tiny bit of coconut fiber for substrate. Its very moist. could be warmer in the tank, stays at about 72. Humidity about 80.
I don't smell anything. The other crab actually sits sort of right on top of where he's dug up, but who knows where he is now. So what do you think? Stressed? Dead? Molting? Crazy?
Thanks!