Survivor Coral?

I am kind of curious more about this Coral, I noticed some tiny animals on some other rock, single and tiny on 3 different rocks, can't say for sure if they were already there, but I don't think so, so now I am wondering how these baby Coral got there, 2 of them are on the far end of each side 1 on the left and the other on the right, the one in the pic is almost center in the tank, if this is a dendro of some type, is this a typical way for them to reproduce? I sure don't want them all over the place.

 

After more digging, I think I may have found the id for my hitchhiker, it appears hes called Phyllangia Mouchez, I think the common name is Lesser Cup Coral, sure looks like my guy to me.