So I met @civics14 yesterday and he pointed out a coral in his tank that he didn't know what it was. I looked at it closely and I think I have the same thing in my tank. I don't know where it came from. It doesn't look like anything that I currently have in my tank. I went on vacation and ten days later when I came back I saw this little guy on one of my rocks. The closest thing I have in my tank is a greens bird's nest but the polyps look totally different. I have attached some pictures of it.
