Meat coral bleaching

[adamsfour]

I have a large meat coral. The top of the coral has bleached white. The sides are fine and full of color and expands in the day. Any idea the cause and how to heal if possible. All my other corals are doing great. Could it be getting too much light

 

[Mr_Knightley]

That looks like a Lobophyllia, not a meat coral (Acanthophyllia). Are any other corals in the tank reacting like this? What are your tank parameters? It could very well be too much light, but Lobos also bleach and react when sand lands on their top surface.