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

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Think sea stars are slow movers who spend most of their time resting on the seafloor? Think again! Check out this sea star cruising across the seafloor on its tube feet. (And watch for the tiny brittle star hustling to get out of the way!) Being able to see this sea star in action, as opposed to as a collected specimen, can provide scientists with new insights into the morphology and behavior of deep-sea stars. For more videos from the Okeanos Explorer Atlantic Canyons and Seamounts 2014 expedit