White almost curly shape on torch coral

[Ubans13]

So I have noticed these white kind of spiral shapes on my torch coral and a few on my candy cane. I have dipped all corals prior to placing in the tank. I have cleaned with a brush as well. I noticed maybe one or two at first. Went away for the weekend and I seem to really notice them now. They dont move and wasnt that hard to remove. Just scraped right off. Then coral dipped again. Any ideas?
This is the best pic I could get.

 

[Catchemall]

Spirorbid worms

 

[Ubans13]

Thank you. The weird part is I finished dosing prazi pro for flukes about 4 days ago. Which should have killed all worms.

 

[Lionfish Lair]

They may be dead and just their calcareous tube remains.

 

[Reefing Madness]

They are called Pileolaria:
Serpulidae:
http://chucksaddiction.thefishestate.net/