How do Gulf corals beat the heat?

How do the coral reefs in Abu Dhabi survive the heat? Does the coral manage to beat the heat by creating a stable local stock of heat-resistant corals or by some genetic development by the generations over thousands of years?

A reef builder has taken samples of hump coral from Abu Dhabi and sent it to a lab to find how they acclimatize and survive in hot water.

A type of algae lives inside the coral’s tissue and produces 90% of its energy by producing sugars, and in return, the coral provides it with shelter and nutrients. In contrast; when the temperature exceeds 35C the algae produce oxygen radicals that damage the coral tissue. To protect itself, the coral essentially spits out the algae. The coral can live up to one week from its reserves then it needs to take back in the algae or it will die.

The coral can reproduce in two ways: through fragmentation or larval production; fragmentation is when a piece of the coral breaks off, rolls across the sand; larval reproduction is when larval float for about a week until they develop the ability to attach themselves to a rocky surface. Once there, they begin secreting their skeleton, becoming the first block of a new colony.