Scientist broke a new record.- edited by Aishee Biswas

In the Izu-Ogasawara Trench located off the southern coast of Japan, a group of scientists has set a new world record for capturing and filming the deepest fish ever documented.

In a groundbreaking scientific expedition conducted by a joint Japanese-Australian team, fish were caught and filmed at depths greater than 5 miles (8 kilometers) beneath the ocean's surface for the first time. The expedition's leader, Professor Alan Jamieson, announced on Monday that the team from the University of Western Australia (UWA) and the Tokyo University of Marine Science had caught two snailfish using traps set 8,022 meters deep in the Japan Trench, located south of Japan. The voyage spanned two months.

According to the expedition, the snailfish belonging to the Pseudoliparis belyaevi species are the first of their kind to be captured at depths exceeding 8,000 meters. Although their size remains unknown, this species has been previously documented to grow up to approximately 11 centimeters (4.3 inches) in length.

As part of a decade-long investigation into the deepest aquatic life on Earth, a collaborative expedition deployed remotely operated cameras from the DSSV Pressure Drop. These cameras captured footage of an unidentified species of snailfish swimming at a depth of 8,336 meters in the Izu-Ogasawara Trench off the coast of southern Japan.

 

A decade ago, a deep-sea scientist from the University of Western Australia forecasted that fish would likely inhabit depths ranging from 8,200 to 8,400 meters. A decade of research conducted worldwide has validated this prediction.

HOW WAS IT FILMED?

A camera system affixed to a weighted frame was deployed from the DSSV Pressure Drop to record a juvenile Pseudoliparis species. Bait was utilized to lure aquatic organisms to the frame.

Although a specimen of the juvenile Pseudoliparis was not captured to establish its precise species, several snailfish of the Pseudoliparis belyaevi variety were caught in a trap set at a shallower depth of 8,022 meters within the adjacent Japan Trench. These fish set a new record for the deepest fish ever caught.

The snailfish is an extraordinary creature, with over 300 species, most of which are shallow-water organisms found in river estuaries. However, some snailfish have adapted to thrive in the frigid waters of the Arctic and Antarctic, as well as in the extreme pressure conditions that exist in the world's deepest trenches.

At a depth of 8 kilometers, these fish endure over 80 megapascals of pressure, which is 800 times greater than the pressure at the ocean's surface. Fortunately, their gelatinous bodies enable them to survive in this harsh environment.

Unlike many other fish, snailfish lack a swim bladder - the gas-filled organ responsible for regulating buoyancy. This absence is beneficial for them. Additionally, they are suction feeders, preying on small crustaceans, which are abundant in trenches.