Page last updated at 10:31 GMT, Thursday, 21 January 2010

Deep-sea creatures: Finding food in the dark

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The deepest parts of the ocean are some of the least hospitable places on Earth.

Yet footage from recent expeditions carried out by scientists at the University of Aberdeen's Oceanlab reveals that life in the oceanic trenches is thriving.

Here, Dr Alan Jamieson explains how a fish called a rat-tail, which was found at 5,500m below sea level on the edge of the Marianas Trench, in the western Pacific Ocean, finds food in the dark.

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