Don't judge by color - look more at the patterns the skeleton forms (what you can see of it at least when the polyps retract). Properly ID-ing coral beyond some of the basics (and even then sometimes those are masked/confused) is difficult. It kind of looks like it has hydnophores (conical mounds of fused corallite walls), but maybe not?... So, umm, hard to tell from the photo, and my completely untrained eye, but in comparing to photos I'd guess its not a hydnophora. Mostly because the "valleys" don't seem to meander, nor are they as broken up as the hydnophora examples I am looking at. From this distance and resolution, I am also not sure if it has the bumps in between the valleys that are more characteristic of hydnophores? Maybe it is a Merulina Ampliata or M. Scarbricula (although apparently these aren't as common?)
Really you would need a proper taxonomist to weigh in, and potentially examine the dead skeleton (or part of a skeleton) for a full on ID. My guess is that it is probably a Merulinidae family coral, genus being a hydnophora or merulina.
Awesome coral though, very pretty!
Oh, and a link on Merulinidae:
http://biophysics.sbg.ac.at/coral/merulin.htm
EDIT: Hmm, apprently I'm late to the party, just clicked on your links! If it is a merulina, that's awesome man! Not as common, and they form different structures (plates, fans, etc) depending on the local water conditions. In other words, the colony's growth will vary throughout! The book I've got also lists them as being somewhat more difficult to keep. Apparently they are also very susceptible to being attacked by other corals, and often lose / die in this case. They are relatively passive, despite their sweepers. (again, not my information or experience, just listing what I've read)
