Is it possible for all 4 of my crabs to be molting at the same time? 1 of my crabs burried himself about 2 weeks ago and I havn't seen him since. Then little by little the other 3 started to dig down. I would see one walking around for a little bit but then he would be gone about an hour later. I have no idea where 3 of them are but I do see one deep hole by my large rock. I can't see in the hole because of the angle it is on but there is a large pile of sand around it. I want to go looking for them to make sure they are ok but I know I'm not supposed to. Now I understand why everyone gets so nervous when they have a molting crab (if that's what they are doing). You just don't know what they are doing under there, if they are ok or not.