Has my Dried Kelp/Seaweed/Kombu gone bad?

I saw a few posts around this subreddit where everyone said its fine, but I am somewhat skeptical?
I bought this 2-3 years ago, and it was opened for basically all of that time.

I can 100% guarantee on purchase, and even when I had older maybe even 1 year old opened or so packages of this, it did not have at all any of this white stuff… that is what makes me weirded out!

Thanks!