I have one in my SPS tank for three month, doesn't touch anything. I have three cleaner shrimps, one crocea clam and one sallylight foot crab (sp). He was introduced after shrimps and crab, but before clam. I've heard that he is reef safe, but one day may eat your shrimps and crabs. Mine was pretty shy at the beginning, swimming on the back, but now, when feeding time he is the first. Cool thing is I hand feed him. One more reef safe trigger is Crosshatch(SP) very pretty, but $$$.