Corals: Coral reefs represent one of

Coral reefs represent one of our planet’s most magnificent and vital ecosystems, supporting approximately 25% of all marine life despite covering less than 1% of the ocean floor. Learn about corals, the colonial animals that form reefs and host algae in a symbiotic relationship. Find out how coral reefs benefit marine life, people, and the environment, and what threats they face. Learn about corals, their types, colours, symbiotic algae and role in coral reefs. Find out what causes coral bleaching and how to help restore the Reef. What are coral reefs? Coral can be found in tropical ocean waters around the world. But how much do you know about reefs and the tiny animals—polyps—that bui...