thanx angie.they are very active fish mine never hide the male is always doing his shimmy dance for the female .as for clean up crew i have a few fish that like the snails and crabs alike as snacks so yes restocking as always nessesary.normally i would never reccomend a bird wrasse for a reef tank.but my tanks are def not the norm.i expect and accept having to restock clean up crews as im used to keeping fish that eat them.