Why does this egg have translucent marks on it?

[Alvio]

 

[JacinLarkwell]

It's a porous egg, the shell is likely a bit thin

 

[Alvio]

It's a porous egg, the shell is likely a bit thin

Ohhh that makes sense. Thank you!

 

[aart]

Yep, porous would be my first guess too.
Candling it will tell the tale.
Could be thin shelled, but not necessarily.

 

[Alvio]

Yep, porous would be my first guess too.
Candling it will tell the tale.
Could be thin shelled, but not necessarily.

They do break very easily!