If you look at your picture you can already see the flesh peeling and receding.  It already has 50% skeleton showing. The timing of the tissue releasing and the light going off was purely coincidence. That coral was allready in serious trouble. 
		
	
		
		
		
		
			
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				72 gal bowfromt mixed reef sps dominated, 25 gal mineral mud type sump/refugium  Skimmerless 
2x250 14000k phoenix hqi  2x96 pc actinic, 50x flow 
			 
		
		
		
		
	
		
		
	
	
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