yellow tail cleaner wrasse

i recently bought a yellow tail cleaner wrasse because i have some fish that are susceptible to white spot couple of tangs including a powder blue and flame angels etc.I just assumed he would be reef safe like the blue streak so i didnt research him.Turns out he has a taste for coral and is pickin at my corals.I hav sat and watched him and it isn't parasites he's eating he is definately pickin at my corals.I would not suggest anyone with a reef system add this little sucker to their tank, good looking fish but not worth my corals.If anyone else knows anything about this fish let me know plz any knowledge is good knowledge......unless its not true lol

 

what corals he it picking on..??
I had a cleaner wrasse and it would pick on my clam mantels goin after the raised bumps thinkin it was ich or so..