well, i tried everything i could find information on to get Zoidberg back into a shell. it didn't take. today he drowned himself in the water dish. thought he was just bathing when i left for work, but he was still in it when i got home. it wasn't deep enough for him to get trapped in it so i can only guess it was suicide. poor guy. i wish i could have figured out what it was he needed to make him happy. i hope he's in a better place. and i don't mean the plumbing.