Coral reefs, the “rainforests of the sea,” are some of the most biodiverse and productive ecosystems on earth. They occupy less than one percent of the ocean floor, yet are home to more than a quarter of all marine species: crustaceans, reptiles, seaweeds, bacteria, fungi, and over 4000 species of fish make their home in coral reefs. With a global economic value of $375 billion a year, coral reefs provide food and resources for more than 500 million people in over 100 countries and territories. But tragically, coral reefs are in crisis.
https://blogs.ei.columbia.edu/2011/06/13/losing-our-coral-reefs/
