Coral reefs are the rainforests of the ocean as they are incredibly bio-diverse areas formed in water with little or no nutrients. Over
millions of years the cumulative work of tiny coral polyps has built vast formations that support coral, plants and other species. This
episode reviews some of the most remarkable coral reefs on the planet, as well as examining the negative effects human activity such as
tourism and fishing is having on the delicate eco-system of coral reefs.