I picked up a fish that he had that was on the rare side and $$ and wanted to see it eat (no big deal right ?) Thats the start of the story. I have spent a few hours in the store the past phew day and he (that being the owner) was telling me how the 2 green mandarinfish were eating frozen food. Well I didnt want to call him out about that kinda fish never eating prepared food, so I didnt. But when he was feeding the fish I was getting he also feed a few of the other tanks and one of them had one of the green mandarinfish in it. And let me tell you. I watched this fish eat the frozen food. So If you have wanted one of these fish but was always afraid of it not eating n your tank, the one i saw was for a fact eating frozen food.