NOAA Ocean Exploration, Exploring Puerto Rico’s Seamounts, Trenches, and Troughs. Download (mp4, 90.6 MB).
It's a flying, or er...swimming sea pig!
Seen during the Océano Profundo 2015: Exploring Puerto Rico’s Seamounts, Trenches, and Troughs expedition on April 28, 2015, while exploring off St. Croix at 2,400 meters (1.5 miles) depth.