Is it normal for an electric yelow lab to turn a shade of black?

[bwd]

electric yelow lab to turn a shade of black? Colud it be frtom stress I just added some new rock work to the tank? Water is vey good condition.
thanks for the help.

 

[jonah]

Over the years I've seen that in a couple of dominant males. They almost look like they've got a 5 o'clock shadow. Nothing to worry about.

 

[jason2894]

my dominant yellow lab seems to do his lil color change when the tank lights are off.

 

[toddnbecka]

No worries, it's normal for some of them to do that. Some do, some don't, it just depends on their breeding. I have yellow lab's that have never shown the black color, while there are some in a display tank at the lfs that do.

 

[bwd]

Thanks for the help. Now I don't have to worry about this with him. Thanks again