Grey/black Corydoras Aeneus

jelloz · Sep 20, 2009

In the group of about 75 Aeneus Cories that I have raised, I found this Grey/Black one. There is no chance that it is anything else. None of the parents were Grey/Black. I had to crop the picture to get it to upload. In the background you can see a portion of a normally colored sibling.

Is it rare or common? Just curious?

JustKia · Sep 20, 2009

That's a normal one. It's called bronze.
The one in the background is an albino variation.
I'm surprised that you got a regular c.aeneus if both parents were albino.
The albino gene is recessive. If a cory has one albino gene (say from mom) and one regular gene (from dad) then you will get a regular colour cory, but it will carry the albino gene.
If the cory is albino then it has to have got albino genes from both parents and thus can only pass on the albino gene (as it doesn't have the regular gene).
So, you got a surprise there.

jelloz · Sep 21, 2009

JustKia said:
That's a normal one. It's called bronze.
The one in the background is an albino variation.
I'm surprised that you got a regular c.aeneus if both parents were albino.
The albino gene is recessive. If a cory has one albino gene (say from mom) and one regular gene (from dad) then you will get a regular colour cory, but it will carry the albino gene.
If the cory is albino then it has to have got albino genes from both parents and thus can only pass on the albino gene (as it doesn't have the regular gene).
So, you got a surprise there.

Thanks Kia but the picture does not really represent the real colors of the fish. Since I took it on a white background, the white came through. I am no Frank Falcone type of photographer.
I had just taken the fish out of their tank and put them into a plastic tank to transport them. All of my cories become white when I do this. It takes them a day or 2 to darken up but this guy is obviously dark to begin with.
I think it is a color morph? I just don't know how rare they are.

JustKia · Sep 21, 2009

I'm not sure what you're trying to say in that case.

A regular c.aeneus is dark and commonly called bronze.
The albino is a variation not the dark ones.

Inchworm · Sep 21, 2009

Hi jelloz

That's a very attractive cory. I hope you will be keeping him.

C. aeneus bronze are not just drab gray but, especially when they are young, they have a rainbow of colors that appear as light hits them a different way. I wonder if he will stay this color as time goes by. Bronze corys also vary in appearance from one part of their natural habitat to another but are still the same species. Are the parents wild caught?

I hope Coryologist comes by and comments on this.

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