Idk it comes and goes, but the pectoral and tail fins are deteriorating. She breathes fine and doesn't display any abnormal behavior. There are 2 tiger blennies in the tank as well but I haven't noticed anything on them. But they're VERY small and hide a lot. I got them as fry out of my canal. So I don't know, she seems happy. I don't see her "blow dust" after eating something, like the mandarin I had in my old tank did.