Please ID these tentacles

[Paulm7373]

Can anyone ID what these clear white thin tentacles are that constantly move and go longer and shorter in length? I have several of these mostly in pairs all throughout my live rock and seem to come out from tiny holes or crevices in the rock.

 

[chenzo9999]

Spionid worms - most people consider them a harmless filter feeder. I have seen about 10 in my tank at one time, and think they are kind of cool.

 

[Paulm7373]

Spionid worms - most people consider them a harmless filter feeder. I have seen about 10 in my tank at one time, and think they are kind of cool.

Thanks! Yep, I've googled spionid worms and it is definitely what I have. I don't mind the look of them either, but are they harmless or can they be an issue for corals?

 

[mr_X]

They are harmless.

 

[Paulm7373]

They are harmless.

Is it true that they feed off left over waste and detritus?

 

[mr_X]

Yes, whatever they can catch in the water column.