![]() ![]() ![]() “When you get down to the mega deep depths, 8,000 plus, a lot of them are very, very small.” “Because there’s nothing else beyond them, the shallow end of the range overlaps with a bunch of other deep-sea fish, so putting juveniles at that end probably means they’ll get eaten,” Jamieson said. Unlike other deep-sea fish species, young snailfish are generally found at greater depths than adults. The deepest individual caught on film was a juvenile fish. Snailfish also do not have scales, but instead have a gelatinous layer that Jamieson describes as a “physiologically inexpensive adaptation”. Trying to maintain a gas cavity is very difficult at high pressure.” “One of the reason are so successful is they don’t have swim bladders. “Chances are it’s got nothing to do with deep sea – that has to do with being dark.”ĭeep-sea adaptations tended to be less visibly obvious, he said. “When you picture what the deepest fish in the world should look like, the chances are it’s gnarly, black, with big teeth and small eyes,” Jamieson said. Sign up for Guardian Australia’s free morning and afternoon email newsletters for your daily news roundupĪt 8,000 metres underwater, the pressure is 800 times greater than at the ocean surface. The expedition’s chief scientist and founder of the Minderoo-UWA Deep Sea Research Centre, Prof Alan Jamieson, said specific adaptations enabled some snailfish species to live about 1,000 metres deeper than the next deep-sea fish. ![]() There are more than 400 known species of snailfish, which live in a wide variety of habitats ranging from shallow waters to the darkness of the deep ocean. Using unmanned submersibles known as landers, researchers deployed baited cameras in the deepest part of these trenches. Scientists from the Minderoo-University of Western Australia Deep Sea Research Centre and the Tokyo University of Marine Science and Technology had set out to explore the Japan, Izu-Ogasawara and Ryukyu trenches – which are 8,000, 9,300 and 7,300 metres deep respectively – as part of a decade-long study into the deepest fish populations in the world. ![]()
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