Hello, I have a true percula that appears to be growing some type of fungus or other parasite in patches around his body. It's difficult to describe, and I'm sure near impossible to photograph. Does anybody have any ideas on what it could be or how to treat it? It seems to be getting worse. I've noticed it progressing over the last week and a half or so. In some patches it's a darker color than his natural orange. On his white spots it's slightly bubbly but still white.