What's this? Looks like a spider egg..

[JeridJohnson]

Anyone know what this is? The best I can describe it is that it looks like a spider egg.. I see 3 of them on the rocks.. there might be more that I havnt found yet..

cheers,
jerid

 

[JeridJohnson]

After many searches I found this post which shows something similar..
http://www.aquariumadvice.com/viewtopic.php?t=68039&highlight=cotton+ball

 

[Fluff]

Ball sponge. Pretty typical and harmless.