This video says about itself:
The Incredible Sea Life of the Red Sea Coral Reef | BBC Earth
Simon Reeve dives into the Red Sea to get close to its incredible fish and marine wildlife.
Scientists offer a new way to accurately map coral reefs using a combination of Earth-orbiting satellites and field observations. This first-ever global coral reef atlas contains maps of over 65,000 square kilometers (25,097 square miles) of coral reefs and surrounding habitats: here.