What happened to my space monster?

[the_fish_man]

My beloved space monster looked like the one on gonzos site and it was popping out babys like there was no tomorrow. But then it closed for a week or so and it now looks like this. Although it isn't my pic it looks identical. What could have happened to it?

 

[Mantid]

It probably lost a some of it's zooxanthellae when it closed up. The light may bring it back now that it's open.

 

[the_fish_man]

It probably lost a some of it's zooxanthellae when it closed up. The light may bring it back now that it's open.

Okay thanks

 

[DGPets]

Have you changed lighting on the tank?
Any water chemistry parameters that may have fluctuated, or other changes that may have stressed the corals?