Sorry, I'm not positive what it is.. hopefully someone else will know. I have a plakat male with the same thing.. except for laying on his side. One eye is slightly bigger than the other and the face is red and almost flakey. Last week it was his right eye, then it got better, and now it's his left.
It seems to be clearing up though. All I did was make sure his water was always sparkling clean, added aquarium salt and a couple drops of aquarisol.
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