OK. Now I am just doubtful.
Here is a page of "published" lens fungus images:
https://www.google.com.au/search?q=l...w=1920&bih=916
and here is a page of "published" lens crazing images:
https://www.google.com.au/search?q=l...w=1920&bih=916
"published" because we cannot be certain of Internet content.
TG. Have a good look at it all and TELL US what you think you've got there. - It could be both.
I just can't tell from your single image.