It is believed by some scientist that no fish can survive below 8,200 meters as their bodies wouldn’t be able to produce enough osmolyte.
However, to set a fresh fact, the Japan Agency for Marine-Earth Science and Technology (JAMSTEC) has filmed a snailfish at a depth of 8,178 meters (26,830 ft) in the Mariana Trench. According to them, it is a record depth for capturing a fish in video footage.
In May, members of JAMSTEC and the Japan Broadcasting Corporation (NHK) teamed up to explore the depths of the Mariana Trench using a new HADAL-lander with 4K video cameras. After traveling approximately 7,500 to 8,180 meters below the surface, the lander had mackerel attached on the front to attract the vicious critters that prowl below. A few moments later to the team’s surprise, snailfishes had begun to gather around, and on checking the numbers the little aqua-fellas set a new record for the deepest fish ever seen.
At 8,178 m, the snailfish beats the previous record holder by 26 meters.
The researchers believe that this fish is the same as the purplish-looking Mariana snailfish, previously caught on camera and spotted at depths of up to 8,080 m. The video footage of the deepest recorded fish will be presented at a special exhibition titled ‘DEEP OCEAN’ at the National Museum of Nature and Science in Tokyo from August 28, 2017.
Osmolytes are compounds affecting osmosis used to help the cells of fishes endure the intense underwater pressure. It is also used to calculate the maximum depth where a fish can survive.