what is this stuff?

[jak424]

Sorry I can t post a pic, but someone got the camera. Anyhow, anyone want to offer what these transparent white tubes are that are rapidly advancing across the LR? They seem to have openings on the end, but nothing comes out - ever. No mucus, no two probes, nothing. But it is growing quickly. It sees to be swarming and even killing a small amount of green bubble algea on the rock. Should I be concerned about this hostile takeover?

 

[buzz]

Fan worms?

 

[nm reef]

Sounds like a type of sponge....I've got some in my reef...grows in a tubular formation...sort of interlocking....not a problem that I know of.

 

[buzz]

http://www.imagequest3d.com/catalogu...s/n010_tif.htm
Just trying to think of worms that I've seen on my live rock...

 

[jak424]

NM Reef seems the closest. It is interlocking and weaving on top of itself. It's not a worm, doesn't move. Just grows. Thanks for the feedback.