What am I

[Bree42]

I found this guy 3 days ago in my refugium.
Since this guy moved it's now determined that it is an anenome. The big question is, is it harmless?
http://www.drekster.com/myrescues/whatamI.htm
New picture there if it doesn't come up hit reload
Thank you for any idea's

 

[littlefish72]

do you have any rock from Florida?.........I've seen some aptasia looking anemones that look like that on Florida rock..........I have no idea what their deal is but you should prolly try to kill them

 

[OrionN]

That is the reefkeepr's bane. Kill it quick. It is the dreaded aptasia.