Abnormal looking vein?

[Jmash]

This egg has this huge, distinctive single vein arching though it. I don’t really see other accessory veins and it looks pretty different from the others. I also don’t think it’s changed much in the past 48 hours. I do see a dark spot in the center, which could be an embryo...

is this one a dud? I have 8 eggs in the bator but only 7 work with the auto turner, so if this one is bad I’d rather take it out sooner than later.

 

[lady dimitrescu]

that is a blood ring, which means it's dead. take it out before it explodes
https://www.raising-happy-chickens.com/candling-blood-ring.html

 

[Wolfefarmyard]

x2 That’s a blood ring, meaning it’s died.