I have a Woods Polyp that I bought as a 3 stalk frag.... It's trying to take over my tank now, but it's fun to watch!Pom pom xenias. They're not an expensive coral, but the pulsing ("chomping") action is really soothing to watch. They're actually my wife's new favorite coral (she's named it "snapper"; I think it's the only coral that actually has a name in our tank...)