What happened to my Hammer coral?

[bfazio1030]

It was fine. Then boom. Is it dying or just receding?

 

[MaxTremors]

Hard to say from the pic. Can you take one under white lights. Also, what are your parameters, how old is the tank, and what kind of lighting and flow?

 

[Woodyman]

It was fine. Then boom. Is it dying or just receding?

Corals can also be temperamental from time to time. It could just be in a mood and be fine again in a couple days.

But while we're here go ahead and do what Max recommend above, along with listing out any changes you've recently made to the system