Caulastrea is a candy coral, right??? That hard coral is doing just fine. Lollypop coral is a soft coral, it's blue, grows heads on the top of each branch then loses them and molts to grow new ones every couple weeks...
UM what have you got against fish, crabs, and starfish?
How bout a powder brown tang? Mine loves the xenia. I don't grow it in that tank and don't feed it to him anymore for fear of him developing a taste corals of all sorts.
This lollipop coral was discussed here a few days back. It sounds like the same thing. The pics are gone but it ended up being a tunicate of some sort.
Caught the little bugger last night! It was a nudibranch. It look so much like the Xenia it took him wiping out almost every colony before i found him. His back even pulsated like the Xenia. One crazy look'n creature. I have a pic but don't know how to post. He is over 2 inchs long!