I have a "Golden Arothron" he is also very fussy with his food, and is chewing large chunks off the live rock as we speak. He has developed a preference for uncooked prawns, squid, and Coral Frags, Coral heads being there natural diet! However it is very expensive to keep buying those Frags for him. By the way, they also love to eat "Caulerpa Algae" as a treat. I hope this information helps you.