Jett, I'm still not positive that "orange ball corallimorph" is really the right name for this pesty little critter, but it was my closest guess when I was having trouble with these. Other folks thought it might be a mojano, but it didn't look anything like those photos. Whatever the real name for it is, it's bad, reproduces really quickly, can sting other corals, and you want to get rid of it.

Here's my post when I had them taking over our tank:
http://www.maast.org/showthread.php?...ht=orange+ball