NOAA Ocean Exploration, 2016 Deepwater Exploration of the Marianas. Download larger version (mp4, 27.4 MB).
This synaphobranchid eel, observed during the 2016 Deepwater Exploration of the Marianas while exploring Northwest Guam Seamount at a depth of approximately 1,210 meters (3,970 feet), didn't seem all that pleased to see us!