Fish eye color...

[Magnum Man]

I'm not sure of the thread I was involved in previously, but that involved fish with red eyes, & why they would be that color...

then there are lamp eyes, or several varieties that have neon blue eyes, & I'm familiar with a Cichid or 2 that have yellow / gold eyes

...I just noticed these fish today, & I can't think of another species right now, that has black eyes... this fish doesn't look well, just because of the deep black eyes... the line bred gold Denison barbs, have a percentage that are or go blind, that have black eyes...

Dan's isn't importing African Tetras right now, so these are not in stock, there anyway...
but can anyone think of another normal freshwater tropical fish that has black eyes??? or what conditions would have caused these to evolve this way???

https://www.dansfish.com/product.detail/5277/Alestopetersius-sp.-Red-'Lukenie-River---Nioki'-(Alestopetersius-sp.-'Lukenie-Red')

 

[Magnum Man]

OK, this was the previous thread about fish with red eyes...

I was wondering why some fish have red eyes

When I had fish 20 years ago, one of my favorites was a pair of angels that had red eyes… back then I called them my “stoned angels” there seems to be several species of fish, that this trait is pretty common… I looked it up, and came across this article…...

www.fishforums.net

 

[Magnum Man]

Looks like Wet Spot had some back then as well...

 

[Magnum Man]

not a lot on this specific fish, but found a video of them in a tank... black eyes and all...

 

[emeraldking]

In general, fish that live closer to the surface or those that live in more bright water, have black eyes. The melanin in their eyes protects their eyes against the light.
Those that live in deeper water, black water or those that live between roots in lagoons, can already have lighter colored eyes, like blue for instance. Those that live way deeper and where's almost no light can have wat lighter colored eyes. The less they depend on light, the less melanin they need in their eyes.
But it aso depends on how the eyes are constructed, whether they can see far or not, of can see colors or not. Not all fish eyes are constructed the same way. I've written an artcile once about it.

It's a 4 page article...

 

[Colin_T]

In general, fish that live closer to the surface or those that live in more bright water, have black eyes. The melanin in their eyes protects their eyes against the light.
Those that live in deeper water, black water or those that live between roots in lagoons, can already have lighter colored eyes, like blue for instance. Those that live way deeper and where's almost no light can have wat lighter colored eyes. The less they depend on light, the less melanin they need in their eyes.
But it aso depends on how the eyes are constructed, whether they can see far or not, of can see colors or not. Not all fish eyes are constructed the same way. I've written an artcile once about it.

It's a 4 page article...

It's a 4 page article that isn't in English and we can only see 2 pages

 

[emeraldking]

It's a 4 page article that isn't in English and we can only see 2 pages

Yes, I have also written something similar in English on my website. Click "Eye vision".

 

[Colin_T]

Found it

Eye vision | emeraldking-aquatics

www.emeraldking-aquatics.com