Likelihood of melting: Extremely Low
Crown Royals are another one of those common giant palys like the Green Implosion (common green button polyp) that took on a name once someone was patient enough to give it lots of light until it colored up to become a beautiful swan. The Crown Royal starts out as a brown polyp. Then, the skirts take on a green color and the body develops a purple tone. Finally, the center becomes white, and then white with green. When they get to this point, they even look impressive when closed. The closed polyps become covered in a neon green color that glows under actinics or LEDs.
Don't give up on an ugly duckling.
These corals are truly impressive for their size and color. The polyps get to half dollar size or larger in the right conditions and the skirts can go on for miles when placed in decent current. I've found that the skirts can irritate other zoas placed too close. So, care should be taken with placement. Also, the speed at which they grow can make them a bit of an aggressive coral.