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Swimming Crinoids
Video courtesy of the NOAA Office of Ocean Exploration and Research, 2015 Hohonu Moana. Download (mp4, 40.0 MB)

During the dive on the southeast side of Johnston Atoll on September 17, 2015, the remotely operated vehicle disturbed several crinoids who took to the water. This video provides a fascinating explanation of how these aanimals, whom you might not initially suspect of being swimmers, do in fact swim.