i honestly don't know ,whatever is tasty at the time i would assume .i have lps and non reef safe wrasses together and they don't hurt the corals in any way ,absolutely no picking .i myself would give him a try but I'm partial to wrasses and would feed them sps if needed .
sedgro hit the nail on the head but he is a very beautiful fish ,wish i could find one ! very,very nice catch there . if you are anywhere near me and dont want him please PM me as i would love to be the owner .im in upstate newyork and will travel ~