thanks for replying,yeah its just like you said a metallic sheen,its not raised or fluffy looking.i dnt hav a cam so cant get a pic up but il try.he seems fine and hes acting normal so hopefully its nothing.thanks for your helpIs it a sort of metallic sheen? If so, it's a very common colouring on all sorts of fish and is perfectly normal and nothing to worry about.
If it's raised or fluffy looking, or has sore looking edges, it maybe a fungal infection or something of that sort and may need treating.
Any chance of a pic?