Hi, yesterday ive noticed 2 of my goldfish has a new patch of white color in a place that previusly was orange. one of them has it on his forhead and the other on the "connection " of his back to his head . Its weired that its came out of nowhere and in both of them in the same time. Do you hink it might be a disease? Ive attached videos, its not very clear ,but try to understand which is the fish that I'm trying to focus on.