Environmental organization Greenpeace has recently explored the ocean floor around Svalbard up in the high Arctic. The aim of the expedition was to highlight an ecosystem which has never been seen but is now threatened by encroaching fishing operations.

This video clip is part of a new documentary: The Polar Explorer. Filmed by Mark Terry, filmmaker of the award-winning The Antarctica Challenge: A Global Warning, it chronicles the Greenpeace scientific expedition crossing the Northwest Passage and shows new climate data from both the Arctic and Antarctica.