Tiny plant cells, known as dinoflagellates, that live within coral tissue can help to regulate the osmotic pressure in corals to better cope with a highly saline environment. KAUST researchers suggest this may be one of the secrets of corals from the Red Sea and Persian/Arabian Gulf, which are extremely tolerant of heat in extraordinarily salty waters.

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Image: Bleached corals from Farasan Banks in the Red Sea.
© 2016 Anna Roik