New species of fish discovered in ocean's deepest depths

By Hilary Duncanson
Friday, 15 October 2010

A new species has been discovered in a part of the ocean previously thought to be entirely free of fish, scientists said yesterday.

Mass groupings of cusk-eels and large crustacean scavengers were also discovered living at these depths for the first time, scientists said. The findings, in one of the deepest places on the planet, were made by a team of marine biologists from the University of Aberdeen and experts from Japan and New Zealand.

Click Picture for larger viewThe snailfish was found living at a depth of 7,000m in a trench in the South East Pacific Ocean, which was previously thought to be free of fish

 

 The team took part in a three-week expedition, during which they used deep-sea imaging technology to take 6,000 pictures at depths between 4,500m and 8,000m within the trench.

The mission was the seventh to take place as part of HADEEP, a collaborative research project between the University of Aberdeen's Oceanlab and the University of Tokyo's Ocean Research Institute, supported by New Zealand's National Institute of Water and Atmospheric research (NIWA).

 


The University of Aberdeen said these latest discoveries helped shed new light on life in the depths of the Earth. Oceanlab's Dr Alan Jamieson, who led the expedition, said: "Our findings, which revealed diverse and abundant species at depths previously thought to be void of fish, will prompt a rethink into marine populations at extreme depths.

"This expedition was prompted by our findings in 2008 and 2009 off Japan and New Zealand where we discovered new species of snailfish known as Liparids inhabiting trenches... at depths of 7,000 metres – with each trench hosting its own unique species of the fish.

"To test whether these species would be found in all trenches, we repeated our experiments on the other side of the Pacific Ocean off Peru and Chile, some 6,000 miles (9,656km) from our last observations. What we found was that indeed there was another unique species of snailfish living at 7,000 metres – entirely new to science – which had never been caught or seen before.

"A species of cusk-eel known as Ophidiids also gathered at our camera and began a feeding frenzy that lasted 22 hours – the entire duration of the deployment. Further research needs to be conducted to decipher whether this is also an entirely new species of cusk-eel that we have discovered.

"Our investigations also revealed a species of crustacean scavengers – known as amphipods – which we previously did not know existed at these depths in such great numbers. These are large shrimp-like creatures of which one particular group, called Eurythenes, were generally far larger and occurred much deeper in this trench than has ever been found before."

Dr Toyonobu Fujii, a deep-sea fish expert from Aberdeen University, added: "How deep fish can live has long been an intriguing question and the results from this expedition have provided deeper insight into our understanding of the global distribution of fish in the oceans."

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Authored by: Anonymous on Tuesday, August 27 2013 @ 07:29 AM EDT New species of fish discovered in ocean's deepest depths
Great to read about the newly found snail fish and the interesting aspects surrounding it. It was thought to be an extinct species for quite some time till it was again seen in the South East Pacific Ocean. These findings by the scientists will definitely serve as a reference material for future studies. windows7vswindows8.com
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