The Last Reef 3D 2012. This IMAX documentary explores coral reef ecosystems across locations including Palau, Mexico, French Polynesia, Vancouver Island, and the Bahamas using groundbreaking 3D cinematography . The film compares reefs to underwater cities, revealing symbiotic relationships among diverse marine life including colorful fish, sea turtles, manta rays, jellyfish, and intricate coral formations . It highlights biodiversity hotspots vital to ocean health and examines threats from climate change, ocean acidification, and human activity . The documentary opens with footage of Bikini Atoll where reefs recovered after nuclear testing, demonstrating nature's resilience while underscoring the urgency of conservation.