Do betta's eyes change when sleeping?

[wah543]

Throughout the day my bettas have like solid colored eyes but at night when they're sleeping they get like a ring around their eyes, has anyone else notice this?

[Myates]

It may be the lighting/shadows.. they don't have eyelids and can't change the shape of their eyes.

[wah543]

It's not so much the shape it's the color instead of being solid black its like black with a light ring around it

[Melodica]

Yeah, I've noticed that happening to my guys too. Looks kinda funny the first time you see it.

[AyalaCookiejar]

I've never noticed this... When the lights are on my bettas do not sleep, so needless to say, I have never seen their eyes when they are sleeping.

However, you may find this interesting... I have a blind Betta whose eyes are never solid black. They always have a white ring around them, and the black part in the middle glows red. I don't know if this has anything to do with him being blind.

Now that you mention it, though... I think I'll go check out all of their eyes and are if my blind bettas eyes look significantly different than the others.

[wah543]

The first time I noticed the eyes like that I thought something was wrong but I guess it happens every time

[Melodica]

I thought the same thing, but I guess it's just their way of adapting their eyes to darkness.