your right about get him out of water, i almost killed him not having something for him to climb. i fixed that. i got a chinese algae eater and he seems to be fine with the crab. i heard that crabs are agressive(sp) but mine seems protective of the fish: protroling(sp), geting on the plant and looking around. the fish haven't been shy and the crab just moves out of the way. one of my fish(i don't know what he is but hes about 3in and clear, really clear) moved in the cave(very small) for the crab and the crab didn't mind(!!!!????)