Deep sea trenches form by a process called "subduction" where the Earth's tectonic plates meet and push together. The deep sea can be a lonely place. Life here is sparse - the extreme conditions make survival difficult.

About three-fourths of the area covered by ocean is deep, permanently dark, and cold. This is the deep sea. Oceanographers divide the majority of the ocean midwater into five broad zones. (NOAA)

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. [1] [2] Conditions within the deep sea are a combination of low …

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).

Commonly considered to be the waters below 200 meters (656 feet), the deep ocean is a place where it is dark, food is scarce, and temperatures and pressures are extreme. Life is hard here, but there’s a lot of it. There’s no place like home, but what does home look like …

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.”

How deep is the ocean? At 36,070 feet (10,994 meters) below sea level, Challenger Deep in the Pacific Ocean’s Mariana Trench is the ocean’s deepest known point. Comprehending just how deep this is is a difficult exercise.

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.

Did you know that corals not only grow in coastal reefs but in the deep ocean as well? This overview dives into everything to know about deep-sea corals.

2025年3月24日 · Researchers Find Massive Rare Sponge Mounds Hiding in the Deep Sea. NOAA scientists and collaborators have found rare deep-sea sponge mounds between two of California’s most explored marine protected areas, signifying how vast and mysterious our ocean truly is. Scientists were surprised to find this vast mound in an unexpected place