Knowing: Coral Reefs

Coral reefs: the city, the rainforest, the heart of the underwater world of our planet. While reefs take up less than one quarter of one percent of the ocean floors, they are home to at least 25% of all marine life. Essentially, that's two million species of marine life that are found on, in or around coral. Coral reefs are symbolic for the color, health and life of our oceans...and yet, they are rapidly disappearing.