Those are mine in that link. I still have bunches of them. They do pulse when they are stressed or shadowed and then they also pulse for no reason I can notice. They don't pulse like a xenia does though. All the polyps will close at the same time and then within seconds they will open back up. Then close on que, open at various times. Mine are pink with green polyps under actinics and then a washed out yellow/tan under MH, which is too strong for mine.