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The hadal zone, also known as the hadopelagic zone, is the deepest region of the ocean, lying within oceanic trenches. The hadal zone ranges from around 6 to 11 km (3.7 to 6.8 mi; 20,000 to 36,000 ft) below sea level , and exists in long, narrow, topographic V-shaped depressions.
Hadal zone sediments have a remarkably high amount of bacteria as compared to nearby abyssal ecosystems. [6] It is notable that not all species found in the hadal zone are solely adapted to the high pressure and low temperature hadal environment, and can be cultured outside of these conditions. [17]
The hadal zone (named after Hades, the Greek god of the underworld) is a zone designated for the deepest trenches in the world, reaching depths of below 6,000 metres (20,000 ft). The deepest point in the hadal zone is the Marianas Trench, which descends to 10,911 metres (35,797 ft) and has a pressure of 110 megapascals (1,100 atm; 16,000 psi).
Pseudoliparis amblystomopsis, or the hadal snailfish, is a species of snailfish from the hadal zone of the Northwest Pacific Ocean, [1] including the Kuril–Kamchatka and Japan Trenches. [ 2 ] In October 2008, a team from British and Japanese institutes discovered a shoal of Pseudoliparis amblystomopsis at a depth of about 7,700 m (25,300 ft ...
In general, the snailfish (notably genus Pseudoliparis) is the most common and dominant family in the hadal zone. [4] Pseudoliparis belyaevi is a marine and deep-sea species which inhabits depths exceeding 6,000 meters that was described from a single specimen from 6380–7587 m in the Japan Trench. [9]
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Pseudoliparis swirei, the Mariana snailfish or Mariana hadal snailfish, is a species of snailfish found at hadal depths in the Mariana Trench in the western Pacific ...