what the heck are these?

[chrisarc]

Just Noticed these things growing in my sand. What are they?

 

[patrick8929]

hard to tell with the angle try a front shot

 

[andersh]

kind of looks like feather dusters

 

[chrisarc]

Cmon guys and girls someone has to know what these things are. I did a water change 3 days ago and they werent there. Theyre about 2 inches long and theyre sprouting everywhere. Murph, Bang,Ophiura, what are thes things?

 

[maingo]

Small feather dusters looks to me, they tend to come up everywhere is conditions are right. I have loads in my tank.

 

[fubaredn05]

I had those everywhere in my tank, but since I got my diamond sleeper goby he pretty much cleaned them up. I think they are sand snails. b/c I had big sand snails and all of a sudden one day I had those everywhere. When I looked closely they had little antanae things coming out of them and they looked like little tiny snails crawling in and out of them.

 

[bang guy]

Some type of Bristleworm probably.
After feeding the tank watch them to see if one comes out. If one does come out try to count the number of antenna.

 

[fish3]

bristle worms and feathers more likely worms