They're such a fascinating creature. This weekend I cut a single polyp off of a brown zoa that we have. We bought a small colony for a few bucks last winter all closed up as a "rescue" to see if we could get them back to life, not knowing what color they would be. They are thriving and growing like a weed now, but not a flamboyant color... so I took one huge polyp, very carefully as my fragging skills are still developing, placed it gently on a dab of glue on a perfect piece of rock. placed it into my frag tank and realized as it opened up and reached out that I glued it down upside down! doh!!
Yet I still don't think it will die, IDK. Zoas can be the most finicky at times, but the most hardiest in others.