The unknown type of snailfish of the genus Pseudoliparis was identified by Alan Jamieson, a marine biologist at the University of Western Australia, and captured by an autonomous camera swimming at a depth of 8,336m (27,349ft) in the Izu-Ogasawara trench, south-east of Japan.
The previous deepest fish recorded was the Mariana snailfish (Pseudoliparis swirei), recorded at a depth of 8,178m (26,831ft) further south between Japan and Papua New Guinea in the Mariana Trench.