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Oceanographers divide the majority of the ocean midwater into five broad zones. The very deepest depth of the ocean is roughly 2,000 meters deeper than Mount Everest is tall—36,070 feet deep (10,994 m)! Each zone has a different mix of species adapted to its specific light level, pressure, temperature, and community.
Many deep-sea creatures cope by creating light themselves - also known as bioluminescence. Narwhals dive to this depth up to 15 times a day in search for food. The Japanese Spider Crab is the largest known crab with a maximum leg span of 3.8m.
The deep sea is broadly defined as the ocean depth where light begins to fade, at an approximate depth of 200 m (660 ft) or the point of transition from continental shelves to continental slopes. Conditions within the deep sea are a combination of low temperatures, darkness, and high pressure.
Why Nasa is exploring the deepest oceans on Earth. Could our understanding of the deep ocean help unlock the mysteries of outer space? Nasa's space mission is leading us to unexplored depths...
What is the “deep” ocean? The deep ocean is generally defined as the depth at which light begins to dwindle, typically around 200 meters (656 feet). Remotely operated vehicle Deep Discoverer explores the Mariana Trench at the depth of 6,000 meters (3.7 miles).
The average depth of the ocean is about 2.65 miles (14,000 ft) deep. The deepest part of the ocean is called the Challenger Deep, which is about 6.86 miles (36,200 ft) deep. Challenger Deep is located beneath the western Pacific Ocean in the southern end of the Mariana Trench.
The deep sea —that part of the ocean that is perpetually dark—is 103 million square miles in area. However, despite a dramatic increase in exploration in recent decades, we still know very little about this “inner space.” We urgently need to know a lot more. Why? Well…
