Underwater close-up footage of a red Gorgonian Sea Fan on a coral reef. Coral reefs are the one of earths most complex ecosystems, containing over 800 species of corals and one million animal and plant species. Coral reefs are currently suffering from rising sea temperatures caused by Global Warming. The water is clear blue in this example of a fragile ecosystem. This image was taken whilst Scuba Diving at Phi Phi, Andaman Sea, Krabi, Thailand.