Just to share how I eventually got this finicky fish to feed on frozen food. Got this 3 inch butterfly from an LFS and of course during the initial 1 week refused to eat anything, mysis, opened up clam, even rejected live brineshrimp. Finally got some live tubifex worms 2 days ago and it started eating the live worms. Then I alternated feeding with frozen bloodworms- initially it spat out the bloodworms but over several trials, it eventually reconsumed the worms that were spat out and now consumes the frozen bloodworms quite readily. I am unsure of the nutritional value of these worms for marine fish but I soak them in Selcon first before feeding to the butterfly. Just something to share with those who acquired these finicky eaters.