I keep watching them and feeding them bits of shrimp, but I think at least one of them is coming out of there and going into the other small tank. They make me very nervous around my fish when those claws are waving by for food.
Like the thread and humor too. It's refreshing. I have emeralds in all 8 systems...no problems. Crabs with pointed claws, get 'em out...flat claws, good crab.