Hi, first time breeding and had a clutch of 5 good eggs. Employed a policy of "don't mess with it" when I pulled them though, so they are set in the incubator as I found them. One looks like it's possibly going bad, photo taken just a few moments ago.

https://i.imgur.com/Hvb16KQ.png

They were laid/discovered on the 4th September, so due to hatch roughly next week on the 29th October (55 days from that date).

The eggs have all been candled, including this one and it has plenty of vein action going on. Had someone with a bit more experience than myself look at it the other day (in person) and he said it looked fine (after candling). Just wondering what I could have done to prevent the egg going this way? It's a bit bizarre as it's the only egg to develop this kind of colouration.

This is a photo of the whole clutch on the 2nd of October for comparison: https://i.imgur.com/wJjkVX6.png

Not entirely sure why it's went this way, looks like mould development to my untrained eye possibly caused by dripping off the lid of the box we've got them in (the lid is particularly wet, not going to lie). Expecting it to not hatch at this point but by my Googling it looks like it may so I'm reluctant to chuck it out just yet.

Regards,

- Joppsta