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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 species has a slender and elongated body with a tadpole-shape, typical of snailfish species. The body lacks scales and instead has smooth, gelatinous skin that aids in withstanding the immense pressure of the deep-sea environment. The gelatinous layer has a lower ion concentration than other body fluids to increase buoyancy. [12] In the ...
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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 ...
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]
The species in these deepest records are unknown and may be undescribed, but have been referred to as "ethereal snailfish". The deepest-living described species is Pseudoliparis swirei, of the Mariana Trench, recorded at 8,076 m (26,496 ft). [14] [22]
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 .
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]