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Twirling Jelly
Video courtesy of the NOAA Office of Ocean Exploration and Research, Windows to the Deep 2019. Download larger version (mp4, 66.2 MB).

During Dive 05 of the Windows to the Deep 2019 expedition, we encountered a charismatic swimming jelly called a helmet jelly that was twisting and tumbling as it moved across remotely operated vehicle Deep Discoverer’s field of view. With a characteristic groove encircling its swimming bell, the helmet jelly is classified as a coronate scyphomedusa, with a scientific name of Periphylla periphylla.

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