| Ocean Today. The deep ocean - :15784 | Education and Outreach | National Ocean Service (NOS)
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Ocean Today. The deep ocean
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Ocean Today. The deep ocean
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    Okeanos Explorer (Ship) ; United States, National Oceanic and Atmospheric Administration., Office of Ocean Exploration and Research, ; United States, National Ocean Service, ; ... More ▼
  • Description:
    The video is part of the Ocean Today educational video collection (Exploration). It has open captions and can be viewed in regular (640 x 36) or high resolution (1280 x 720). Video's transcript (narrated by Randi Miller): "The deep ocean. A place so different, filled with strange life forms. But what's down there? How much do we know about it? As it turns out, not very much. 95% of the ocean remains unexplored, most of which is considered the deep ocean. But what exactly is the deep ocean? The first 200 meters of the ocean are the open ocean. Much of the marine life we know of lives here, where there is light. Below 200 meters, where there is little light left, you enter the Twilight Zone. Once you pass 1,000 meters, the water is completely devoid of light, and you have reached the deep ocean. Down here, temperatures plummet to 39 degrees Fahrenheit, and constantly stay near freezing. The pressures at these depths range from about 40 to over 110 times the pressure of Earth's atmosphere. But how could anything thrive in these conditions? It was originally thought that life cannot survive without light. We now know that despite this lack of light, many creatures can live in this extreme place, such as: microorganisms in hydrothermal vents, deep sea corals, fish, and many other bizarre creatures. Exploring the deep ocean is challenging because of the harsh conditions, but marine scientists are on a mission to document new species in this unusual place."

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