My pom-pom Xenia has been through a lot of havoc. I had a long fight with green hair algae which is gone now. But also I allowed my tuxedo urchin to go over the beautiful Xenia colony I had. And it ripped a lot of it off. This is the only survivor. So I made a little quarantine tank. Trying to get my Xenia to come back. I do see that its little arms are beginning to extend. My lesson: don't let the urchin get on the Xenia corals. Hope this little guy comes back.