In my experience anthias will take any finely processed frozen food. I've never had a problem getting them to eat it. They will not take to pellets or flake easily, at least in my tanks. The bigger more robust species seem to me more voracious eaters. Lyretails, Bimacs, Cooperi, etc will eat on the first day usually. The more delicate looking ones seem to be more finicky eaters, and may take a few days. I make my own frozen using a knockoff of Roggers recipe and like I said, they all eventually eat it. Never lost one to not eating. Have lost quite a few to other problems (disease, aggression, etc)