( Andriashev & Pitruk, 1993) 
Pseudoliparis belyaevi is a species of snailfish found in hadal zone of the Northwest Pacific Ocean,  particularly the Japan Trench. 
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. 
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).  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.  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.  
This species reaches a length of 10.8 cm (4.3 in).  
The species is a marine and bathymersal fish that lives at depths exceeding 6,000m deep.  It is also harmless to humans.