Ybpw
Killer fish you have recieved. As far as not eating what you are feeding dont worry. Just watch his belly is always full because he is picking off all the rocks as you have stated. Also, try feeding a smaller food like a reef coral/invert frozen food & you will see him/her gobble that stuff up. May be even thawed & vitamin treated krill roe is great. :eat:
enjoy that little guy.
34 gallon solana led HOB refug
yellow banded possum, geometric pygmy hawk, red dot trimma goby, candycane trimma goby, panda goby, 2 banggi cardinal & too many shrooms & corals to count. happy reefing!