Need an ID

[rrasco]

I have been watching this for some time now. It started growing about 2 months after the tank was setup, came in on the LR. I noticed the little fingers a while back; not sure what they're called, are they the polyps? I could tell it was going to be something, but I figured it was some crazy algae or something I had no clue about; I guess it still could be. However, today when I looked at it I noticed the mouth and it looks like a coral now instead of little hairs. Now that I took a picture it looks like another head is about to pop out in the middle of this photo. These are tiny, about 1/2", if that. I really couldn't say what kind of coral it is...that's why I'm here. My best guess would be some kind of euphyllia, mushroom, ricordea, but I could be dead wrong and honestly have no clue. Whatever it is it looks like it's going to be bad ***. A little help?