The Stressful Reasons Corals Are Becoming More Colorful

Corals are showing vibrant colors as a stress response to rising ocean temperatures, a phenomenon known as coral bleaching. This occurs when heat stress causes algae, which corals rely on for food and protection, to leave. Without algae, corals become vulnerable and can die if the stress persists. However, corals have developed a defense mechanism by producing their own pigments, which act as a sunblock and help them survive temporary heat stress. Research indicates that these pigments may aid in the recovery of corals by attracting algae back, but prolonged heat stress remains a threat.

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