I've got a RD/Midas fish that I've had for about 2 years. He's about 10 inches and has a nice Huge Nuchal hump. The past couple of days he's gotten some kind of "tumor" between the bridge of his nose and where the hump begins... This thing is growing everyday and is "bulbous". Kind of looks like one of those air bags that some of those specialty goldfish have. It looks like it could be "popped like a zit" and when he hits the glass with it, it compresses and what not... Does anyone have any idea about what this is and if it could be dangerous?
