NOAA’s 2016 Deepwater Exploration of the Marianas will take please between April 20th and June 10th. You can still catch live streaming of the last leg of the expedition from June 17th to July 10th by visiting their youtube channel (https://www.youtube.com/user/oceanexplorergov) and clicking on one of their live camera feeds (ex. https://www.youtube.com/watch?v=9n21Pmde9I4).
The full schedule of the expedition is as follows:
Leg 1 (April 20 – May 11): Live streaming of sea floor dives
Leg 2 (May 20 – June 11): Sea floor mapping (No live streaming)
Leg 3 (June 17 – July 10): Live streaming of sea floor dives
Basket Star Population and other Sea Creature Footage: NOAA Office of Ocean Exploration and Research, 2016 Deepwater Exploration of the Marianas