An optical feedback loop involving the coral host and its photosynthetic microalgal symbionts is responsible for the extreme coloration of corals during certain bleaching events. Colorful bleaching occurs after brief or mild exposure to heat or nutrient stress. Importantly, it can indicate good recovery prospects for the affected corals.

中文翻译：

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珊瑚漂白：生存的多彩斗争。

涉及珊瑚宿主及其光合微藻共生体的光反馈回路负责在某些漂白事件中使珊瑚极端着色。短暂或中度暴露于热或营养胁迫后，会发生五颜六色的漂白。重要的是，它可以表明受影响珊瑚的良好恢复前景。