Ok, those pics look different than the ones I have found online! I would say that is definitely it! Especially the last pic.
So then, how do I care for the thing? Are these common corals? Like I said, I pretty much just randomly got it with a "mushroom" rock, and in the last couple days I have noticed that there is some other sort of sps looking thing that makes up one of the 'points' of the rock that has also extended its polyps.
Thanks a bunch