Question

What is Deep Ocean ???​

Answer 1

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The deep ocean is generally defined as the depth at which light begins to dwindle, typically around 200 meters (656 feet).

Answer 2

The deep sea or deep layer is the lowest layer in the ocean, existing below the thermocline and above the seabed, at a depth of 1000 fathoms or more.

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 top 200 meters of the ocean are known as the sunlight, or euphotic, zone.

The deep sea begins below about 200 m, where sunlight becomes inadequate for photosynthesis. From there to about 1,000 m, the mesopelagic or “twilight” zone, sunlight continues to decrease until it is gone altogether.

The deepest part of the ocean is called the Challenger Deep and is located beneath the western Pacific Ocean in the southern end of the Mariana Trench, which runs several hundred kilometers southwest of the U.S. territorial island of Guam. Challenger Deep is approximately 36,200 feet deep.