Need to know what these tubes are.

[spd3001]

My reef aquarium (90 Gal) was neglected while my wife and I were traveling for about 18 months. Of course the corals all died leaving one yellow headed jawfish, one yellow watchman goby, a banggai cardinalfish, one small hermit crab and a lot of algae. The fish all seem happy and eat what they're fed every two or three days. But here are the pics of the tubes (worms?) Can anybody tell me what they are. They don't seem to move and they have a fan at one end as shown in one of these pictures. There are literally hundreds of them and they seem to be about the diameter as a mechanical pencil lead.

 

[EeyoreIsMySpiritAnimal]

Feather duster worms- harmless filter feeders

 

[spd3001]

Feather duster worms- harmless filter feeders

Thanks for the quick response. I was hoping that they are small duster worms and harmless.

 

[NonstopSoda]

definitely a feather duster though ive never seen such long shells before!