What does it mean when your goldfish has red scales?
It means your goldfish has a type of disease called herpes, and
no, not the type you're thinking of. This is a type of herpes known
only to goldfish. They get it when they have sex with a rock in
their fish bowl. You should get your goldfish checked for herpes
right away. You don't have to go to a vet though, just suck on it's
fins and it should be fine. If it tastes like salt, then they're
fine. But if it tastes like vinegar, your goldfish has herpes. Hope
this information helped.