Posted 2 Years, 8 Months ago groundtwelve Expert Boarder Posts: 115   One of my gold fish have 2 spots on the tail. It appears to be the same color as its tail. The spots are about the size of a sand or smaller. Would anyone know if this is a disease? Should I worry about it at all? The administrator has disabled public write access. Posted 2 Years, 8 Months ago mortician2005 Expert Boarder Posts: 125   i'd keep an eye on it, if it grows or moves or duplicates then you have a problem. The administrator has disabled public write access.