I consider my tank to be maturing as its been up and running over a year but I've never seen this grow in the tank before. What I am talking about is the small, round, almost mushroom-like heads attached to some sort of branch growing to the right of the zoa the frag. That frag has been there for a while, but they have never appeared until now. I'm thinking they may be bad for the tank but from the research I did, I could not figure out what they are classified as. The picture was taken from my phone so it's not the greatest but if anyone knows, I'd love to know.