Unknown invaders

[sheyandpete]

Hi people,
Can anyone id these tiny critters for me as they are all over my tank.
Thanks in advance.

 

[Lovemyreef2015]

spirorbid worm, they are harmless and show up as the tank matures.

 

[saltyfilmfolks]

Could be lil feather dusters. Pics are a little blue to see detail.

 

[DSC reef]

Could be vermetid as well but hard to see. Do they lay out slime at all or webbing?

 

[aKlevans]

I would say the shape is right for a vermetid, but they seem too white.
I say spirorbid worm.

 

[sheyandpete]

Thankyou for your help everybody,
Have looked at them in white light and they appear to be white.

 

[sheyandpete]

More photos in normal light