Brownish white fuzzy looking stuff in my sump?

[cginter]

So I was cleaning the protein skimmer today when I took a good look over of my sump and I noticed all these fuzzy thing hanging from the glass in the first two chambers?

I was hoping that these are pineapple sponges and not some kind of bacteria infection starting to take over my sump.

Thanks.

 

[Reefing Madness]

Looks like Pineapple sponge