London, April 5 : At a depth of more than 8 km underwater, a fish filmed by a team of researchers from Japan and Australia has been certified by the Guinness World Records as the deepest fish in the ocean to be observed.

Scientists mainly from the Tokyo University of Marine Science and Technology and the University of Western Australia on August 15, 2022, filmed the unknown snailfish species of the genus Pseudoliparis at a depth of 8,336 metres, near the bottom of the Izu-Ogasawara Trench off southern Japan in the western Pacific, reports Xinhua news agency.

According to the Guinness World Records, the unprecedented depth -- more than double the vertical extent of Mount Fuji -- is approaching what is thought to be the biological bottom line for fish.