This is according to a rapid assessment expedition led by Conservation International with New Zealand Geographic.

The coral reef systems of the Al Wajh lagoon on the Red Sea, the world's fourth largest barrier reef system, are estimated to host approximately 210 species of hard corals and 120 species of soft ...

Up to 90% of the coral found in shallow areas of the northern lagoon had bleached. Bleaching doesn’t automatically mean death, but it severely weakens the coral and jeopardises survival.