Please Help! Something is Off With One of My Eggs

[BrittleViolets]

I candled this egg today and saw this black spot inside the egg. The embryo is still alive it seems, but none of the other eggs have this dark spot. The embryo is on the other side of the egg in this picture. I would appreciate it if someone could explain what is wrong! Do I need to discard the egg?

 

[nuthatched]

Can you please get a picture in a dark room?

 

[BrittleViolets]

Can you please get a picture in a dark room?

Of course!

 

[BrittleViolets]

Can you please get a picture in a dark room?

 

[nuthatched]

It looks like some vessels burst then clotted, I'd just monitor it for now

 

[BrittleViolets]

Is there anything I should be looking out for?