I've got a reasonably large turbo snail that was getting harassed by a large emerald crab in one of my tanks. I noticed he was acting weird and then saw the crab next to him during lights out so I moved him to another tank. He doesn't move much anymore and thrashes his shell around when I try to feed him nori where in the past he would grab the nori and eat it until it was gone. Has anyone had this happen in the past and is this going to resolve itself or is he going to starve due to being too stressed to eat?