i noticed a few days ago that my black moor had scratched the top of his eye, not the clear part, but right up near his head. looks like the skin got peeled off in a tiny strip like this long l--l and it's silver underneath. today, after being gone since sunday, it looks like there is blood inside of his eye. it's a very bright red spot at the bottom of the eye bubble. not flat, but a 3-D rounded shape, as i can see it protruding into the bulge of the eye when he is facing me. he's not having any other problems or rubbing on anything like it's bothering him, but i wanted to see if there was anything i could/should do or if this is a common problem with big-eyed fish.