{"id":2730,"date":"2014-12-24T01:52:07","date_gmt":"2014-12-24T01:52:07","guid":{"rendered":"http:\/\/www.lifeandnews.com\/articles\/?p=2730"},"modified":"2016-08-13T23:16:47","modified_gmt":"2016-08-13T23:16:47","slug":"how-we-found-worlds-deepest-fish-in-the-mariana-trench-and-why-we-must-keep-exploring","status":"publish","type":"post","link":"https:\/\/www.lifeandnews.com\/articles\/how-we-found-worlds-deepest-fish-in-the-mariana-trench-and-why-we-must-keep-exploring\/","title":{"rendered":"How we found world\u2019s deepest fish in the Mariana Trench \u2013 and why we must keep exploring"},"content":{"rendered":"

By Alan Jamieson<\/a>, University of Aberdeen<\/a><\/em><\/p>\n

It was our 14th expedition to the trenches of the Pacific Ocean, where depths can exceed 10,000m. And it was due to be our last for the foreseeable future.<\/p>\n

We had been aboard the Schmidt Ocean Institute\u2019s (SOI) vessel RV Falkor for 30 days. It was almost over. Then, it turned out to be \u201cthe big one\u201d.<\/p>\n

For this was the expedition in which my colleagues and I discovered a snailfish living some eight kilometres below the waves, deeper than any fish we know of. My colleagues from the University of Hawaii even recovered some in their traps.<\/p>\n

In the past six years we have made many discoveries in the depths, such as the missing order of Decapoda<\/a> (shrimps) that were long thought absent from the trenches but are actually rather conspicuous.<\/p>\n

In the Kermadec Trench off New Zealand we found the \u201csupergiant<\/a>\u201d amphipod, a crustacean 20 times larger than its shallow-sea relatives. We also filmed large numbers of tadpole-like snailfish in multiple trenches, and as deep as 7700m<\/a> in the Japan Trench.<\/p>\n

Snailfish surprise<\/h2>\n

Based on these observations we predicted that when exploring the Mariana Trench \u2013 the world\u2019s deepest \u2013 we would find the the Mariana\u2019s own personal snailfish, probably living between 6500m and around 7500m, with more being found at the deeper end of that range.<\/p>\n

Exploring the Mariana Trench. The record-breaking fish appears at 1:45<\/figcaption><\/figure>\n
\"\"<\/a><\/figure>\n

Oceanlab, University of Aberdeen<\/a><\/span><\/p>\n

We also predicted that we would see the decapods and supergiants in the upper depths of the trench, and right enough there they were.<\/p>\n

A device used to gather samples of ocean floor had an inspection camera on it to monitor the equipment. One night after a dive to 7900m when watching the footage coming back in, a strange ethereal little fish swam past. That got our eyebrows raised. It looked like a snailfish, but was extremely fragile (even for a snailfish) and had a very distinctive appearance.<\/p>\n

This prompted a case of \u201cgame on\u201d, to find it again, and sure enough we did. The deepest we found it was at 8145m, nearly 500m deeper than our personal record from the Japan Trench.<\/p>\n

This of course means that our predictions were slightly wrong, but also makes it very exciting: there are still fish, and perhaps other things, down there to discover and this is what drives us to do more. Our work at the deepest place on Earth is not done yet.<\/p>\n

Why we need to keep exploring<\/h2>\n

As much as we are excited about finds such as these, we are typically chased up by people who ask \u201cwhy do we bother?\u201d, and add rather deflating comments such as \u201cwhat benefit does this have to society?\u201d<\/p>\n

In response I explain that such exploration benefits responsible stewardship of the oceans. In the long term, conservation and maintenance of the our seas relies on us really understanding the ocean \u2013 that is, the ocean in its entirety from the surface to what lies beneath the deepest seafloor<\/a>. The anthropocentric opinion of \u201cout of sight, out of mind\u201d simply doesn\u2019t cut it, and is sadly still common place.<\/p>\n

\"\"<\/figure>\n

Deep-sea divers: the author (right) with colleague Thom Linley.<\/span>
\nStuart Piertney<\/span>, Author provided<\/span><\/span><\/p>\n

The deep ocean is far deeper than a person can dive to or fish from, but that doesn\u2019t mean that the things down there are of no consequence to society. We must not, however, confuse curiosity-driven exploration with the search for entertainment or stockpiling consumables.<\/p>\n

We know that the deep sea is not exempt from a changing climate<\/a> or man-made disturbances such as plastic pollution<\/a>. The depths are intrinsically linked to processes in the upper ocean that we humans are continually meddling with.<\/p>\n

Changes that happen in the upper ocean will have an effect on the largest habitat on Earth, yet people question why we study the deep sea. We say, how can we conserve the largest habitat on Earth if we know nothing about it? In the quest to understand the entire ocean, people have to study the shallow bits, the deepest bits and everything in-between.<\/p>\n

\"The<\/p>\n

This article was originally published on The Conversation<\/a>.
\nRead the original article<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

By Alan Jamieson, University of Aberdeen It was our 14th expedition to the trenches of the Pacific Ocean, where depths can exceed 10,000m. And it was due to be our last for the foreseeable future. We had been aboard the Schmidt Ocean Institute\u2019s (SOI) vessel RV Falkor for 30 days. It was almost over. Then, […]<\/p>\n","protected":false},"author":39,"featured_media":6027,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/posts\/2730"}],"collection":[{"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/users\/39"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/comments?post=2730"}],"version-history":[{"count":2,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/posts\/2730\/revisions"}],"predecessor-version":[{"id":6028,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/posts\/2730\/revisions\/6028"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/media\/6027"}],"wp:attachment":[{"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/media?parent=2730"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/categories?post=2730"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifeandnews.com\/articles\/wp-json\/wp\/v2\/tags?post=2730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}