What is this?

[gclackum]

Looks like ? No, It is a yellow mass with yellow roots coming off of it. It is located in a low light area.
<fieldset class="gc-fieldset">
<legend> Attached files </legend>

>

class="gc-images" title="roots 2.JPG_Thumbnail1.jpg[/IMG] style="max-width:300px" /></a>

>

class="gc-images" title="roots.JPG_Thumbnail1.jpg[/IMG] style="max-width:300px" /></a> </fieldset>

 

[gclackum]

Come on people? little help here

 

[gclackum]

I tought sponge too. I just can't figure out the string like projections that move with the current. Do sponges have projections. And it looks like it has little red sponges in it. Sorry about the blurriness but it is under a rock and I can't get the shutter to close fast enough.

 

[mvm]

Some kind of macro algae?

 

[calireefer]

It looks like a yellow sponge with caulerpa roots growing over it.

 

[theplatypus]

Spaghetti worm?

 

[jmaneyapanda]

There are many micro-brittle stars that make their homes in sponges. ALmost all of my encrusting sponge is loaded with mini-stars. When I feed, their arms come out to grab food floating by. Could it be this?

 

[FutureInterest]

Its a sponge. I've got the same king growing in random dark areas of my tank.