I bought this coral a year and a half ago, was told the name of the coral but I didn't write it down. Now I can't remember what it is. Can anybody ID this for me? Also while you are looking can you tell me what the white stuff is on its back side. I lost power at home due to an ice storm and have since lost quite a bit of corals and a few fish. I have been doing massive amounts of cleaning and water changes but I am now battling algae and then this white thing appeared. Please ignore the algae, I have already plucked it from the skeleton.

