Symbiotic zooxanthellae

Symbiotic zooxanthellae are tiny, photosynthetic algae that live inside the cells of certain marine animals, especially corals. They use sunlight to produce energy through photosynthesis, providing nutrients to their host. In return, the coral offers the algae a protected environment and supplies carbon dioxide and waste products needed for photosynthesis. This mutual relationship is vital for the health and growth of coral reefs, as it helps corals build their calcium carbonate skeletons and thrive in nutrient-poor waters. Without zooxanthellae, many corals would struggle to survive, making these algae essential partners in reef ecosystems.