i have a piar of cleaner wrasse once, stressed out and killed half of my fish. ussually cleaner wrasse wont accept prepared foods, either your very lucky or what you have is a sabor tooth blenny or false cleaner wrasse. good luck with your fish.
This is definitely not an imitation, it's a cleaner wrasse. I've seen shots of the mimicry the Blennys use for predation, but the are unsuccessful in one area: the head and mouth. The Blennys have a rounded head.
BTW, I repeated the same success I had last night. I turned off all equiptment that produces water flow, and fed a bounty of flakes. The wrasse ate like Sally Struthers at a buffet. I hope this works out, this is definitely my favorite SW fish. I hope the success continues.