I have a nice colony of this coral that has been growing very rapidly. It is to the point where it is reaching the height of a colony of gobstoppers. Not touching them but to there level and within an inch or two. The last several days the polyps on the side close to the nepthea have remained closed. Does the Nepthea utilize any chemical warfare? I can't find much on them. Everything I read says Temperament: peaceful or semi aggressive with no detail on how they are semi aggressive.