I have had an orchid dotty back for a couple of years now and it recently began to have this white growth near the back of its dorsal fin. I have loaded a bunch of pictures for some help ( In one of the pictures it looks like the tail fin has it as well but this is a white reflection from the light or something.) None of my other fish have it. The orchid dottyback has had this for a couple of weeks and it seems to be getting worse. I also have a Cleaner Wrasse who for years has chased my fish around the tank and picked things off of them, but he doesn't seem to be going after this. Any help would be appreciated. I would hate to loose this fish. It is very reclusive so catching it and putting it in another tank for treatment would be very difficult.