I'm a first time incubator and am trying to learn as much as I can but I need a little help please. 
I have an egg in the incubator I’m not sure about. It doesn't seem as developed as the others when I candle. The other embryos are moving and wiggling but this doesn't and I also can't see any veins. I can see a definite embryo shape in a round darker area that is clearly defined and seems to have a ring around it. I've been trying to figure out if it's a blood ring from pictures, Google etc but I can't tell if a blood ring is on the inside attached to the shell or floating inside like this egg of mine seems to be
I'm on day 9 of incubation
Thanks

I have an egg in the incubator I’m not sure about. It doesn't seem as developed as the others when I candle. The other embryos are moving and wiggling but this doesn't and I also can't see any veins. I can see a definite embryo shape in a round darker area that is clearly defined and seems to have a ring around it. I've been trying to figure out if it's a blood ring from pictures, Google etc but I can't tell if a blood ring is on the inside attached to the shell or floating inside like this egg of mine seems to be
I'm on day 9 of incubation
Thanks