10 Gallon Tank Spiral Things on my Saltwater Glass?

[justinwhitening]

I just noticed these white spiral things that just started appearing on my tank glass. I think I first saw them a couple of days ago, but I did not think anything of it, until I looked closer and noticed they are spiral, maybe like worms or something. They do not move though, they just sit there like they are cemented to the glass.

I know I have some beneficial bristle worms in my tank, not the harmful fire worms, but the white / pink ones that help eat detritus and excess food in the tank. The adult ones in my tank are very small, the largest one I have seen is smaller than half an inch probably. Could these possibly be bristle worm larvae? Or is it something else? All thoughts and predictions are appreciated.

 

[fish 321]

Spiorbis worms, totally harmless. They should scrape right off the glass.

 

[justinwhitening]

Spiorbis worms, totally harmless. They should scrape right off the glass.

Thank you, I just did some research on them. Where do they come from?

 

[fish 321]

They can come in on corals, snail shells, hermit shells and rock.

 

[justinwhitening]

They can come in on corals, snail shells, hermit shells and rock.

I actually added 4 more hermit crabs in my tank maybe a couple of days before they started to show up. I guess they may have hitchhiked on some hermit shells. As long as they aren't harmful, I'm okay with them staying.

Thanks for the help.