It is said that when a tank gets above 83 degree or so, xenia start to melt or dying off but it is observe in the natural reef that xexia could be out of the water, sitting baked in the sun for long period of time, during low tide. I'm sure it can get much hotter than 83 degree during such time. What is the explaination for this?

Don't we feel miserable when the temperature in the office hit 83 degree but feel great sun beathing on the beach at 95 degree. My conclusion, xenia loves sun beathing. lol.