Eels, sharks and a colour-changing octopus in a previously unexplored part of the deep-sea. | BBC Earth

Did you know that the vast majority of our planet is deep ocean, representing the largest living space on Earth? Yet we know very little about what lies below the depths of the ocean's surface. This video features highlights from the March 10 of the Hohonu Moana: Exploring Deep Waters off Hawaii expedition. The dive was on a ridge extending to the southeast of Castellano Seamount, starting at a depth of ~2,000 meters. [Source: http://oceanexplorer.noaa.gov/okeanos/explorations/ex1603/dailyupdate