ID please

[wallie03]

Weird filter feeder. Smaller ones around it that you can't see in the picture. It's about the size of a penny. Thanks

 

[markw]

Scroll algae?
Mark

 

[wallie03]

Yeah, I think you're right. Any thoughts on it?

 

[markw]

Harmless. Filter feeder. Unless you dont like it, let it grow. Search the term, theres another thread about it too.
Mark