Can anyone tell what's wrong with coral?

[FlopNewsom]

This coral has stopped opening. It has been this way for about 3 weeks. If you look closely at the picture, there seems to be some white spots on it. I marked some of them. Ideas appreciated. I've had it a long time.

 

[bskerrichard27]

How long have u had it what are yur water parms what kinda lights it under