Newer tank setup after a 10 year hiatus in reef life. Water parameters are great and coral, inverts are all doing well. However, after the addition of new live rock and one new fish (Pics attached) we woke up to a completely cleaned off polyp frag , no remains at all and a now missing cleaner shrimp with no remains or exoskeleton present anywhere. I thought the fish added was some sort of Basslet or Dottyback , but after the discovery this AM have begun to wonder if he is some sort of Wrasse? Might we have a hitchhiker bristle worm? Long spine urchin and Turbo Snails are fine, fan worms and many mushroom corals are seemingly undisturbed , but too many to tell. Only other fish in the aquarium are four Chromis and seven blue Damsels. The fish in question has a mostly white body with a violet hue and yellow stripe across its back. Approximately 2" long and 3/8" in diameter.