Feeding my coral beauty...

[MikeP]

I bought a coral beauty a little while ago and I'm not sure about what to feed him. I have been using spectrum optimum flakes for all of my fish since I started the tank. I have never seen him eat when I put it in. I have seen him pick off of the rocks though but I'm not sure if he is actually eating anything. Is the coral beauty typically a picky eater? What else can I buy for food? Some kind of pellets?

Thanks for any help.