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Published: 10:10, April 04, 2023
Deepest-ever fish caught and filmed off Japan by scientists
By Reuters
Published:10:10, April 04, 2023 By Reuters

This screengrab taken from a video released by the University of Western Australia (UWA) shows a snailfish spotted in the Izu-Ogasawara Trench off southern Japan. (PHOTO / UNIVERSITY OF WESTERN AUSTRALIA)

SYDNEY - Fish have been caught more than 8 kilometers under the surface of the ocean for the first time ever - and filmed even deeper - by a joint Japanese-Australian scientific expedition.

The expedition's chief scientist, Professor Alan Jamieson, said on Monday that two snailfish were caught in traps set 8,022 meters underwater in the Japan Trench, south of Japan, during a two-month voyage by a team from the University of Western Australia (UWA) and the Tokyo University of Marine Science.

Remotely operated cameras lowered from the DSSV Pressure Drop by the joint expedition, part of a 10-year study into the deepest fish population on the planet, also recorded an unknown snailfish species swimming 8,336 meters deep in the Izu-Ogasawara Trench off southern Japan

The snailfish, of the Pseudoliparis belyaevi species, are the first to be caught below 8,000 meters, the expedition said. It wasn't immediately clear how big the fish were, but the species has been recorded as reaching a length of close to 11 centimeters.

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Remotely operated cameras lowered from the DSSV Pressure Drop by the joint expedition, part of a 10-year study into the deepest fish population on the planet, also recorded an unknown snailfish species swimming 8,336 meters deep in the Izu-Ogasawara Trench off southern Japan.

"The Japanese trenches were incredible places to explore; they are so rich in life, even all the way at the bottom," said Jamieson, founder of the Minderoo-UWA Deep Sea Research Centre.

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"We tell people from the very early ages, as young as two or three, that the deep sea is a horrible scary place that you shouldn't go and that grows with you with time," said Jamieson.

"We don't appreciate the fact that it (the deep sea) is fundamentally most of planet Earth and resources should be put into understanding and how to work out how we are affecting it and how it works."

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