ID of white spirals on glass

[pegasus]

I have what start out as little white commas, growing into slightly larger white spirals. They grow in my DT and pod tank. The skinny, longer specks around it are copepods. These things are hard, and they stick to the glass like crazy... like barnacles. Any ideas?

 

[bang guy]

It's a type of Bristleworm called a Spirorbidae.

 

[pegasus]

Cool. Thanks, Bang Guy.

 

[saxman]

Bang Guy is right, however, Spirobids are actually closer to a fanworm/tubeworm, altho in a broader sense, they're related to bristleworms, as are the other fanworms (to be "politically correct"). The reason I break it down is because when you say "bristleworm", some peeps immediately want to get rid of them, or think they're bad.
If you don't like them, or they become too prolific, you can simply scrape them off the viewing panes.
If you look closely at the Spriorbids, you can see their little "fans" sticking out of their tubes:

 

[pegasus]

Thanks, saxman. They don't really bother me unless they're on the viewing panes. I've got fanworms all over my rocks, so I may as well have some on the glass, right? LOL!