Ocean heat is causing the fourth global coral bleaching event in a decade, with high water temperatures stressing corals and leading to symbiont ejection - a fatal move for the creatures.
Despite their plantlike appearance, corals are animals relying on symbionts for various services such as sugar production, nutrient provision, and health protection.
The recent bleaching events in areas like the Florida Keys, Caribbean, Eastern Pacific, and Great Barrier Reef are attributed to record-high sea surface temperatures lasting over a year.
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