ID this coral

[jupiter]

I think it's a clove or something. I just picked it up because it was all blue but I didn't ask the vendor what it was.

I didn't adjust the colours in Photoshop but I did sharpen the image to make it clearer.

Thanks for any help.

 

[ritter6788]

http://reefcentral.com/forums/showthread.php?t=1781309

 

[jupiter]

Thanks for the link. It helps.
I looked it up. I don't understand that it can "threaten corals" as it spreads, though. There is a brown polyp of some sort on the same rock (as you can see in the pic) and the little blue polyps give it a wide berth. Maybe they are only referring to SPS.