Peniagone Sea Cucumber (likely Peniagone vitrea)
This small sea cucumber is abundant at the base of Axial Seamount, and many different species are common along the Mid-Atlantic Ridge. The cucumber generally crawls across the seafloor, but can also use undulating motions to swim longer distances or escape predators.
References:
http://oceanleadership.org/the-census-of-marine-life-photo-of-the-week-red-peniagone-sea-cucumber/
http://www.earthtouchnews.com/oceans/deep-ocean/dancing-sea-cucumber-spotted-in-the-deep-sea
