Dark circles in yolks

[Smileybans]

I’ve seen blood spots in yolks before but never this. This is an egg from one of my light brahmas. I’m not sure which one but they’re about six months old. This is the second egg I’ve found like this. Not in a row. Just the second one. Does anyone know what it is?

 

[aart]

Mottled yolk.
Have had them here, I don't worry about it.
Fine to eat, wouldn't hatch chicks from a bird that laid them tho.

https://www.backyardchickens.com/articles/common-egg-quality-problems.65923/

 

[Smileybans]

Thank you. I wasn't sure if they were safe to eat or not.