How do Gulf corals beat the heat

Corals and reef fish in Abu Dhabi coastal waters survive because they have managed to beat the heat by hump coral. Adapting to hot water the coral live in symbiosis with zooxanthellae, a type of algae that live inside the corals tissue. The algae producing sugars that provide up to 90 per cent of the corals energy dioxide for photosynthesis. Algae are two species that if one dies the other is unable to feed itself to stay alive. To protect itself, the coral essentially spits out the zooxanthellae. The coral can live off its fat reserves for a week, after that it needs to take the algae back in or it will die. The El Nino subjected 80 per cent of coral reefs to extreme temperatures. Corals white skeleton is made of calcium carbonate-the same substance as human bones- and is sensitive to change in water chemistry. The Gulfs corals seem to be coping also it may be something to do with an unusual complement of protective mechanisms.  Corals reproduce in one of two fragmentations or larval production when a piece of coral breaks off, rolls across the sand land somewhere else and starts growing. Larval production in massive spawning events, when countless billions of tiny, 1mm-long larval bulbs are released. Sometimes they settle for a tittle while the larvae only have a limited time to choose their home.