What is growing on my polyps

[Paramedic9004]

Is this just how they populate or should I be concerned? They appear to be nearly the same color if that helps. Middle of pic.

 

[A. Grandis]

????

 

[mkoop]

????

+1 haha

 

[MrCaveman]

I have something very similar to this. Looks almost exactly like a tumor growing withing the polyp. Was researching right now to find out what it is???

 

[cloak]

My guess would be a sponge of some sort. There's a picture in this link that looks almost identical to what your seeing on your zoanthids. (about halfway down on the first page)

http://www.reefcentral.com/forums/showthread.php?t=1620165&highlight=white+fuzz

 

[Mael]

I recently saw something that was the same size and shape but it was yellow, again in that thread most people assumed it was a sponge.