ID please, are these harmful?

[miguel_piceno]

They are a white tube and at the end appears to be like a feather duster and everytime i try to touch the “fan” it goes back i side the tube

 

[WheatToast]

Tube/fan/feather duster worms. Harmless filter-feeders.

 

[miguel_piceno]

Tube/fan/feather duster worms. Harmless filter-feeders.

Will these sting coral?

 

[WheatToast]

Will these sting coral?

No stinging capability at all. You should be fine.

 

[miguel_piceno]

No stinging capability at all. You should be fine.

Thanks for your help!