The Spectacular Underwater World of Coral Reefs

Coral reefs are among the most biodiverse ecosystems on the planet, and this documentary dives into their dazzling complexity. It reveals the intricate relationships between coral, fish and countless other creatures, and explains why these underwater cities are so vital to ocean life. It also confronts the threats of warming seas, bleaching and pollution that are pushing reefs toward collapse. Beautifully shot and clearly told, it is both a celebration and a warning. Free to stream in 4K on Dr Documentary.

Courtesy of Documentary on YouTube. Watch on YouTube ↗

More Science & Tech Documentaries

Richard Dawkins: The Greatest Show on Earth2010•1h 1m•HD•★8.8The Strange World of Nanoscience2012•17m•HD•★8.7Through the Wormhole2012•45m•HD•★8.6Rule from the Shadows: The Psychology of Power2014•37m•HD•★8.5The Terrifying Reason Why Tornadoes Are Changing2024•46m•HD•★8.0Ultimate Mars Challenge (2012) | Full Documentary | NOVA2023•53m•HD•★7.9Monster Waves: Caught in an Apocalyptic Storm | 4K Documentary2026•53m•4K•★7.8The Gene: An Intimate History - Episode 1 (2020)2025•1h 54m•HD•★7.7How Pollution Is Poisoning Our Skies | Mutant Weather 1092026•45m•4K•★7.7Tarbosaurus: Earth's Deadliest Dinosaur? | Free Documentary History2026•1h 30m•HD•★7.7The Quantum Leap - Neil Johnson's 1999 Christmas Lectures 3/52026•59m•HD•★7.7The Secrets of the Human Brain2023•1h 34m•HD•★7.6