Cory Eyes Darkened

[molver]

Hello!

So I have 3 corys, and I only recently noticed that one my Cory's eyes are going really dark. I mean just the eye, it's almost as black as the pupil itself. The other two corys are the same as ever, a black pupil surrounded by a kind of yellow.

Should I be worried about my dark eyed Cory?

 

[bluesword23516]

Maybe it is going blind.  I have never had cory fish so I am not entirely sure what could be up.  Does it act normal? What are you using for your substrate?

 

[molver]

It is fine other than the eyes. Very active, and always looking for food. I use round gravel as my substrate.

 

[bluesword23516]

I know they prefer sand because it can hurt their barbels. But maybe it scratched its eye or something.

 

[WILDER]

It can be a sign of cancer but it's very rare.
Can you post a pic please?

 

[molver]

Lol I can't find it anymore!
 
I guess it was a short term thing.

I'll definitely post back if I notice it again.
 
The gravel doesn't seem to bother them, actually. I've had them for quite a while, and they're fine.

 

[bluesword23516]

Thats funny! Maybe it was just the lighting. I know I have seen my fish kind of get that too, but I go back a little while later and its gone. Maybe it was lighting.