Slinky Cusk Eel in the Deep-Sea of the Marianas

While diving on Enrique Guyot, 2,655 meters (8,710 feet) deep, a flat-topped seamount presumed to be one of the oldest seamounts on the Pacific plate, ROV Hercules encountered this slinky, slithery cusk eel (family Ophidiidae) with an especially long tail. The scientific name comes from the Greek “ophis” meaning "snake," although the cusk eel is neither eel nor snake but a fish. In the video, you can clearly see the individual’s lateral line- a collection of sensory organs used to detect vibrations in the water, helping in hunting in the darkness. Look closely to see if you can spot some crustacean shrimp and isopods in the frame too, a reminder of the diversity of life found all over in the deep-sea.

Ocean Exploration Trust's Deep-Sea Habitats in the Mariana Islands I & II (NA179 & NA180) expeditions are primarily supported by NOAA Ocean Exploration via the Ocean Exploration Cooperative Institute, with additional support from the Bureau of Ocean Energy Management for AUV Sentry’s participation.