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Pseudoliparis belyaevi
Scientific classification edit
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Scorpaeniformes
Family: Liparidae
Genus: Pseudoliparis
P. belyaevi
Binomial name
Pseudoliparis belyaevi
( Andriashev & Pitruk, 1993) [1]
Pseudoliparis belyaevi, found at a depth of around 27,000 feet

Pseudoliparis belyaevi is a species of snailfish found in hadal zone of the Northwest Pacific Ocean, [1] particularly the Japan Trench. [2]

In the Izu-Ogasawara Trench, south of Japan, a team of researchers from the Minderoo-University of Western Australia Deep Sea Research Centre and the Tokyo University of Marine Science and Technology managed to film the deepest record of a fish, the unknown snailfish species of the genus Pseudoliparis, at a depth of 8,336m (27,447 ft). The fish was recorded by an autonomous deep-ocean lander that was dropped from the DSSV Pressure Drop. [3]

A few days later, in the Japan Trench the team collected two fish in traps from 8,022m (26,319 ft) deep. This possibly breaks the depth record for a fish collected from the seafloor, previously held by Pseudoliparis swirei at a depth of 7,966m (26,135 ft). [4] These snailfish, Pseudoliparis belyaevi, may be the first fish to be collected from depths greater than 8,000m (26,247 ft) and have only ever been seen at a depth of 7,703m (25,272 ft) in 2008. [5] Another fish, Abyssobrotula galatheae, was trawled from the Puerto Rico Trench at a depth of 8,370m (27,460 ft). However, this specimen may have been caught using a non-closing net (a net that is open on the way up and down into the deep) and could have been retrieved at a shallower depth. [6] [7]


This species reaches a length of 10.8 cm (4.3 in). [1] [8]


The species is a marine and bathymersal fish that lives at depths exceeding 6,000m deep. [9] It is also harmless to humans. [1]


  1. ^ a b c d Froese, Rainer; Pauly, Daniel (eds.) (2023). "Pseudoliparis belyaevi" in FishBase. February 2023 version.
  2. ^ Linley, T.D.; M.E. Gerringer; P.H. Yancey; J.C. Drazen; C.L. Weinstock; A.J. Jamieson (2016). "Fishes of the hadal zone including new species, in situ observations and depth records of Liparidae". Deep Sea Research Part I: Oceanographic Research Papers. 114: 99–110. Bibcode: 2016DSRI..114...99L. doi: 10.1016/j.dsr.2016.05.003.
  3. ^ "Deepest ever fish caught on camera off Japan". BBC News. April 2023. Retrieved 2023-04-30.
  4. ^ "Pseudoliparis swirei sp. nov.: A newly discovered hadal snailfish (Scorpaeniformes: Liparidae) from the Mariana Trench". Retrieved 2023-04-30.
  5. ^ "Scientists break new record after finding world's deepest fish". Retrieved 2023-04-03.
  6. ^ "A new species of Abyssobrotula (Ophidiiformes, Ophidiidae) from the Kuril-Kamchatka Trench".
  7. ^ "Galatheae Report 1957-2005 - University of Copenhagen". 5 July 2021. Retrieved 2023-04-30. See Nielson, Jørgen:
  8. ^ Chernova, N.V., 1998. Catalogue of the type specimens of snailfish ( Liparidae, Scorpaeniformes) in the Zoological Institute of the Russian Academy of Sciences. J. Ichthyol. 38(9): 730-746.
  9. ^ "Deepest fish ever recorded revealed by scientists". Ground News. Retrieved 2023-04-03.