actually its quite different. cleaner and idols when eat prepared food can survive. they are only hard to get them to feed. but this butterfly eats only coral polyps. so if it eats prepared food, the nutrition from the coral is still not there. it might get malnutrition. but bro dont give up! u never know? a miracle can happen! haha! actually, chances of survival maybe quite high. i saw this fish at CF also quite sometime back. who knows (: he might be getting what he needs after all