GM, we recently added a show size to sailfin Tang to our fowlr tank. The emperor Angel, now has these marks on him. About a year ago, he really struggled with flukes and almost didn’t make it, we brought him back with a freshwater dip. I also noticed some of the other Fish flashing, so we started prazipro. Any insight would be appreciated.
Emperors are well known for developing these skin blotches for
any skin irritation. The two common causes are ich or flukes. Trouble is, I can't tell you which this is based on just the photos....
Are the eyes hazy at all? If so, I'd say this is Neobenedenia flukes. Can you see any spots on the fins? If so, that might point more towards ich.