The Deep Ocean: A Journey From the Surface to the Mariana Trench | Calm Documentary for Sleep

A calm, slow documentary about the deep ocean, made for falling asleep. The video covers the ocean from the surface down to the bottom of the Mariana Trench, one depth zone at a time. In this video, we talk about the sunlit zone and why most ocean life lives near the surface, the twilight zone and the daily vertical migration of animals, sperm whales and beaked whales and how whales dive, the midnight zone and how deep sea animals make their own light (bioluminescence), and the giant squid and the colossal squid. We also talk about marine snow and whale falls, the abyssal plain, hydrothermal vents, and the Mariana Trench, the deepest place on Earth. At the end, we talk about how much of the ocean floor has been mapped and what we still don't know. CHAPTERS 0:00 The Ocean Surface at Sunset 8:18 The Sunlit Zone: Where Most Ocean Life Lives 18:35 The Twilight Zone and the Daily Animal Migration 28:54 Sperm Whales, Beaked Whales and How Whales Dive 39:08 The Midnight Zone and Bioluminescence 49:20 Giant Squid and Colossal Squid 59:19 Marine Snow: What Feeds the Deep Sea 1:08:53 Whale Falls: How a Dead Whale Feeds the Deep 1:18:14 The Abyssal Plain 1:28:14 Hydrothermal Vents: Life Without Sunlight 1:38:52 The Mariana Trench: The Deepest Place on Earth 1:50:06 Returning to the Surface and What We Still Don't Know SOURCES How deep the ocean is https://oceanexplorer.noaa.gov/facts/... The layers of the ocean https://noaa.gov/jetstream/ocean/laye... The ocean, depth by depth https://www.whoi.edu/ocean-elevator/i... The twilight zone https://www.whoi.edu/know-your-ocean/... The twilight zone's false bottom https://twilightzone.whoi.edu/the-mys... The layer sonar mistook for the seafloor https://oceanexplorer.noaa.gov/facts/... The biggest migration on Earth https://www.scientificamerican.com/ar... How dolphins sleep https://www.smithsonianmag.com/smart-... How deep leatherback turtles dive https://pmc.ncbi.nlm.nih.gov/articles... Record dives of beaked whales https://pmc.ncbi.nlm.nih.gov/articles... How sperm whales sleep upright https://research-portal.st-andrews.ac... The midnight zone https://whoi.edu/know-your-ocean/ocea... How deep sea animals make light https://www.mbari.org/?p=86796 The anglerfish and its lure https://www.whoi.edu/anglerfish/ First video of a giant squid https://ocean.si.edu/node/108321 Why giant squid have huge eyes https://www.sciencedaily.com/releases... First footage of a colossal squid https://earthsky.org/earth/first-foot... Marine snow, food for the deep https://www.whoi.edu/oceanus/feature/... The mucus houses of larvaceans https://www.mbari.org/?p=110324 How a dead whale feeds the deep https://utmsi.utexas.edu/science-and-... Worms that eat whale bones https://www.mbari.org/whale-carcass-y... Metal nodules on the abyssal plain https://www.ocean.si.edu/node/111035 The deepest octopus ever seen https://www.livescience.com/worlds-de... The discovery of hydrothermal vents https://www.whoi.edu/feature/history-... The Lost City vent field https://www.smithsonianmag.com/scienc... The first dive to the Mariana Trench https://history.navy.mil/about-us/lea... The deepest fish ever filmed https://www.ktvu.com/news/worlds-deep... Small animals at the trench bottom https://pmc.ncbi.nlm.nih.gov/articles... How much seafloor we have mapped https://iho.int/en/global-seabed-mapp... Sea species still undiscovered https://repository.si.edu/items/1b12d... FOOTAGE NOAA Ocean Exploration (public domain), Ifremer (CC BY 4.0, creativecommons.org/licenses/by/4.0), plus stock footage from Pexels and Wikimedia Commons. Hush Atlas makes calm, slow documentaries about the natural world, made for falling asleep. Subscribe so you never miss the next video. The narration is AI-generated and part of the imagery is AI-illustrated. This documentary is for relaxation and education. Scientific details such as depths and dates are simplified, and researchers still debate some of them. #DeepOcean #DocumentaryForSleep #OceanDocumentary #DeepSea #MarianaTrench #SleepDocumentary #OceanForSleep #Bioluminescence #FallAsleep #CalmDocumentary #DeepSeaCreatures #NatureDocumentary #Whales #RelaxingDocumentary