ID Please

[foxmulder]

Any idea what these white polyp like creatures are?

They are growing on mu live rock and they seem to multiply in my tank.

Thanks

picture 1:



or

http://img36.imageshack.us/img36/2778/photo3ml.jpg

picture 2:



or

http://img412.imageshack.us/img412/313/photo2cz.jpg

 

[melosu58]

Looks like Q-tip sponges to me.

 

[foxmulder]

What are they?
Should I do something?

 

[melosu58]

Dont do a thing. They are great filter feeders and will help out with getting rid of excessive nutrients.

 

[foxmulder]

Ok. Thanks a lot!