I have a Vtail Grouper. I have had him about a year at about 4" then. He used to love the Marine Cuisine cubes. A few minths ago he started to prefer small silversides. He does not like the larger ones but he will eat them sometimes. He stopped the cubes a few months ago. I ran out of small silver sides and was cutting large ones in half for awhile . Well he stopped eating about 4 days ago maybe 5. Around two days ago I gave him a larger tank. He is the tank boss. He does not appear to breath heavy. He still swims and moves and bullies the Trigger like normal. But he is not eating and is not trying to. His stomach also while not swelled does not seem to be getting flatter as I would expect with no food for days. I don't think there is anything I can do but wait but I wanted to ask. Hes in a 180 with a Trigger and two Eels. He was i a 120 which was becoming cramped. I hope he livea as I just bought this new tank for him. I did treat yhe 120 with Prazi pro as sometimes he would get stressed and start to get flukes. I know that can dull the appetite. But this time seems longer and the fact that the stomach still looks full concerns me.