Found these in my chaeto

[Girthrockwel]

I pulled my chaeto out of my fuge to trim it up and found these pale white things on the strands of chaeto. In water they're open like in the first picture. If you pull them out of the water they snap shut. Any ideas?

 

[cloak]

Pineapple sponges. (harmless)

 

[Girthrockwel]

I may have just figured it out. Pineapple sponges?

 

[Girthrockwel]

Pineapple sponges. (harmless)

Awe man you're quick. You beat me by seconds!