My tank has a vampire tang that has recently come down by a serious illness. This usually healthy fish was fine a few days ago but recently has refused to accept food. Today from observing the fish, the lips of the fish has turned white and the body is covered in a whiteish colour, this may sound like a usual disease but what sets it out from the rest is that lumps under the scales have appeard on both sides of the fish behing the fins. These lumps are not whitish but are the same colour as the surrounding skin. From looking at books on diseases that i own i cannot find any diseases fitting the description. If a person could identify this disease and advise on any treatment would be myuch appreciated.