The Okeanos Explorer is a US federally funded research ship, assigned to ‘systematically explore our largely unknown ocean for the purpose of discovery and the advancement of knowledge’.
There’s a live feed happening between April 27 and May 19, 2017 where the ship will collect information about deepwater areas in the Pacific.
During that time the team will conduct remotely operated vehicle (ROV) dives in areas including the American Samoa, Kingman Reef and the Palmyra Atoll Units of the Pacific
The NOAA Okeanos Explorer website has live feeds, background information and a huge education section with photographs, charts and lesson plans for different age groups. The project has an excellent webinar too:
Relevant XKCD Comic