What am I?

[nivram]

I thought it was some type of acro. But turns out it encrusted over a tube worm.

http://lh5.ggpht.com/_4AK_7tj0kG0/SysaHzZa6OI/AAAAAAAADTM/OoSNaULd2fE/s720/IMG_7008.JPG

Here's an actinics (powerbrite) shot.
http://lh3.ggpht.com/_4AK_7tj0kG0/SysbfEOTMwI/AAAAAAAADTw/BteDs-9jzLc/s720/IMG_7050.JPG

[650-IS350]

I was going to say zoanthids of sort but could be a form of LPS???

[NCNBilly]

Kinda looks like one of the hydnophora varieties, but haven't seen one exactly like that.

[nivram]

Its been identified as a Leptastrea.

[scrapz]

lepastrea?