In case anynone hasn't had the opportunity to see one of these little French angels in person, here is a video I shot that shows their unique and conspicous swimming pattern. It is much like that of percula clownfish and may be a way (in conjunction with their color pattern) to advertise their 'services' to other fish, as they are cleaners when juveniles. They later switch to a diet of algae, sponges, tunicates etc as adults.