Is this duck egg okay?

[msshalom]

Hey everyone! I am currently experimenting with incubating eggs. I currently have two in the incubator and they are about day 8. One of them looks good to me, but on this other egg here there's a dark circle in the middle. Is it just the embryo? I've looked at day by day egg candling and I haven't seen any that look the same so I thought I'd ask. Thanks!

 

[Yardmom]

I think you are seeing the duckling

Veins look good so far

 

[msshalom]

I think you are seeing the duckling

Veins look good so far

Okay, thank you!