Is this something that happens ? Male jag seven or eight years old, He was doing great up until a about six months ago now it seems like he is having a harder time getting his food. I used to feed him one pellet at a time he would always grab it and come back for more now I almost have to drop it in his mouth it seems he can't see it on top of the water . He is always hungry and searching on the top for food and when I am trying to feed him he just grabs where my fingers are most times missing until I nudge the pellet right into his line of attack so to speak. Is this something that happens ? I have to admit I haven't heard of a fish going blind.