You know how the Discus have convex shaped eyes, as in, when you look at them straight on you can see their eyes very slightly.
Well, that part is missing, so if you were to look straight at him, his one eye is convex, and his one is completely flat, like its been ripped off.
I do a 25%
water change once a week, they get a varied diet of both vegetable matter and meat, in flaked, frozen, and freeze dried form, along with some sinking pellets.
Nobody else appears to have this bump, only him. I have another Discus in there, some neon tetras, corys, rainbow fish, swordtails, and a Raphael Cat.
He still eats like he always has, he swims and acts normally, he isn't acting like anything is wrong, but I'm just worried, I have no idea what it is. =/