The Narcetes Shonanmaruae was found to be the world's largest deep-sea bony fish

 The Japan Agency for Marine-Earth Science and Technology (JAMSTEC) announced on 1 January that a 2.5-meter-long individual of the deep-sea fish Yokozuna slickhead, discovered in Suruga Bay of Shizuoka Prefecture, has been found, making it the largest hard-boned fish in the world that lives at a depth of more than 2,000 meters.
　In 2020-2021, the JAMSTEC collected seawater from a wide area south of Suruga Bay to study the biodiversity of the seabed and analyzed the DNA of the skin and feces of the organisms contained in the seawater. As a result, gene sequences of the Japanese serpent eagle were detected near the seabed at the southwest point of Hachijojima Island in the Izu Islands, 400 km south of Suruga Bay.
　In January 2009, the JAMSTEC announced the discovery of a new species of deep-sea fish in Suruga Bay. So far, six fish have been collected, but the maximum length of the fish is 1 m 38 cm, which is not as long as the world's largest giant rattail(maximum length of 2 m 10 cm).
　Yoshihiro Fujiwara, a senior researcher at the JAMSTEC, said: '’It is difficult to estimate their weight and age, but they may live unimaginably long. The fact that such a large fish has been overlooked shows that our understanding of the ecosystem in the deep sea is still insufficient".

Source: Yahoo ニュース