What is it?

[tubz]

I saw this on a piece of rock today. It is about dime size in diameter. Any ideas what it could be?

 

[andysgirl8800]

Looks like a q-tip sponge

 

[Waddi]

Yep q-tip/pineapple sponge, harmless filter feeder.

 

[tubz]

Thanks

 

[Bifferwine]

It is a sponge.