Temp related, Coral
can only survive within a very narrow temperature range, certain corals such as rice corals are more sensitive to warmer temperatures than finger corals. Above their threshold temperature, the coral
expels their little helper single
cell organisms that they depend upon. The can recover if the water
temperature drops significantly and they are downstream of healthy coral, but after several months algea grow on the coral and then permanently kill them. It's happening in every ocean right now as the temperatures have universally raised to the top end of their threshold.
Originally Posted by Zach
Is this strictly water temperature related, or is it light related?
A buddy of mine cares for live reef tanks
, and the closer/more powerful the lights above the tank the greater the chance of bleaching.