What are these guys and how do I get rid of them?

[FloridaFishMan]

Hi,
I have had these things in my tank for a little while now. They grow on everything, glass, snail shells, pumps, ect. My question is what are they and how do I get rid of them? They are a pain to remove. I have to scrape the tank with a razor blade to get them off. Their shell is hard and spiraled. Any advice on how to get rid of these or how to keep their growth to a minimum would be great.
thanks,
Chris

http://reefcentral.com/gallery/data/500/102611worms-1.jpg

[sesegal99]

They are a type of worm / feather duster I believe. Reef Safe. I'd suggest more routine cleaning to keep them from taking hold.

[jenghes]

They are actually tube worms, good filter feeders. I'donly remove them from your viewing areas.

Jen

[grimmjohn]

Spirorbid tube worms..harmless...usually proliferate in nutrient rich conditions....

Cheers,

grimmjohn

[AquariumPerson]

if they grow on your glass(which the often do) you will have to use a razor blade to remove them tho...a regular mag float wont work.