What is the longest you've left fish in the fridge?

patti thought this was worth mentioning said
1

So, the night before we left for vacation we had sushi. Threw the leftovers in the fridge thinking we'd throw them out the next morning. We forgot. We've been gone since July 7. We're headed home as we speak.

Trying to get a grasp on how terrible it might smell. I was thinking/hoping it might just dry out but now I'm not so sure...

Scale of 1 to 10: One being baby powder, ten being baby diaper, how bad is it going to stink?