you know.. it's sorta funny. I see people yanking all kinds of stuff outta their tanks which would normally be found on an actual reef. I understand that in our closed system, what would normally be considered a minor nuisance on a reef could be pretty devastating to a tank but, why not just let things be and see what turns out instead of yanking it just because you don't know what it is? I actually thought it was a stomatella but since it had been a couple months since I'd seen one in there AND it's gotten so big I wasn't sure. I pulled it out of the tank just to get a picture of it and put it right back in before I even got an answer...