Coral reef bleaching has been in the headline news this past summer, as it was the hottest three-month period on record. As ocean temperatures soared to 32°C (90°F) around the Florida Keys and the Caribbean, coral reefs were way past their temperature threshold and started to bleach. But what happens when a coral bleaches?
Coral bleaching is a phenomenon that occurs when coral polyps expel the symbiotic (mutually beneficial) algae called zooxanthellae from their tissues, causing the corals to lose their color and turn white or pale. These algae provide the corals with essential nutrients through photosynthesis and contribute to their vibrant colors. When coral polyps expel the zooxanthellae, it not only leads to the loss of color but also affects the overall health and survival of the coral reefs…