Zoas, It is always recommended to wear proper eye protection when cutting corals. Zoas contain a toxin called Palytoxin which has also been known to damage the eyes of aquarists who attempt to propagate the coral by cutting it and being squirted in the eye. Temporary blindness and permanent blindness have been reported.There growing pretty rapidly. I just tried to scrape some off a rock to reattach somewhere else but it didn’t go well. Is there a trick to it?