Bump on Sebastopol goslings belly

[bigbird]

So, little one is 5 days old.
I noticed that he has a bump on his belly, and I don't remember any of the others having this.
He eats, poops normal, is growing, and very social. Is this of anything to be concerned about?

Thanks in advance.

 

[The goose girl]

It's where the yolk sac was attached when he was still inside the egg. It looks like it's healing nicely. As long as it's not bleeding, oozing, or swollen, it should disappear on its own.

 

[bigbird]

Thank you very much.

 

[gaylittleswan]

I know this might sound like a silly question, but how do you pronounce Sebastopol? I'm a huge fan of the breed, but as I don't have ANY goose enthusiast real life friends, I've never heard anybody pronounce it.

Seb-***-tow-poll?
Seb-uh-stow-pull?

Help!