What is this?!!

[Guerrzack]

Spiral looking things growing on glass. Should I be worried?

 

[Amber.]

They resemble Spirorbid Worms - I consider them harmless and they are just cute little filter feeders. I have a few on my glass and a good old scrub gets them off.

 

[Guerrzack]

They resemble Spirorbid Worms - I consider them harmless and they are just cute little filter feeders. I have a few on my glass and a good old scrub gets them off.

Thanks!