Eyes change color?

[FishFinatic77]

I've been meaning to ask this for a while now, but for some reason I just never did. So, I've had my betta for almost a year now, and since I got him he has always had black eyes. But, at night, his eyes change to a very light icy blue, almost white color. In the morning, his eyes are black again. Can anyone tell my why this is happening?

 

[JuiceBox52]

Could it be the lighting? Or pupil dialysis? I dont know if the latter is possible, just throwing ideas out there

 

[JuiceBox52]

Could you get a pic in the day and at night and post them?

 

[CassCats]

Fish go pale at night and darken during the day. The eyes often can be affected as well, ive seen it in my betta boy.

A dark blue and copper coloured eyes during the day, a light sparkly turquoise at night.

 

[FishFinatic77]

Okay, that makes sense. Is there a reason this happens? Just curious