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There are over 300 species of Snailfish. While many live in shallow waters (tidepools) and river estuaries, some have adapted to the cold water, as well as the high-pressure depths of the world's deepest trenches over 7,000m. [8] In general, the snailfish (notably genus Pseudoliparis) is the most common and dominant family in the hadal zone. [4]
Only one other species of fish has been recorded from depths in excess of 8,000 m (26,000 ft), the so-called ethereal snailfish (living in the same region as Pseudoliparis swirei but somewhat deeper), but it has only been seen on film and remain undescribed. [6]
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The world's deepest fish ever filmed has been caught on camera by scientists from The University of Western Australia (UWA) and Japan at a depth of more than eight kilometres underwater. An ...
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 ...
The record was surpassed by snailfish filmed in the Mariana Trench at depths of 8,145 m (26,722 ft) in 2014 [19] and 8,178 m (26,831 ft) in 2017, [14] [20] and at 8,336 m (27,349 ft) in the Izu–Ogasawara Trench in 2023. [21] The species in these deepest records are unknown and may be undescribed, but have been referred to as "ethereal snailfish".
During the 2014 expedition, several new species were filmed, including huge amphipods known as supergiants. Deep-sea gigantism is the process where species grow larger than their shallow-water relatives. [45] In May 2017, an unidentified type of snailfish was filmed at a depth of 8,178 metres (26,800 ft). [46]
Pseudoliparis are native to the hadal zone of the ocean. They have been observed swimming at extreme depths of 8,336 metres (27,349 ft; 5.180 mi), in very deep ocean trenches of the Pacific Ocean, [ 4 ] [ 5 ] including the Izu-Ogasawara Trench and the Mariana Trench .