Are these worms bad?

[Steverd]

I have these worms/feather duster things on many of my Zoanthid frags.
Are they bad? Do you leave them alone? DO you kill or remove with tweezers?

 

[road_runner]

Are they feather duster worms or vermetid snails.
If feather duster I think its harmless.

 

[Steverd]

Here are a few better photos

 

[road_runner]

Look like a feather duster. Filter feeders and harmless..

 

[Steverd]

Look like a feather duster. Filter feeders and harmless..

Thank you - I will leave them alone.

 

[sfin52]

agree feather duster. Like very fine food.

 

[Ursala]

Very cool addition to a reef!