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Files in this Data Supplement:
Movie 1. Free-swimming Nemopsis bachei. This video shows three consecutive cycles of jet propulsion Nemopsis bachei, in which the wake is made visible by oral cavity dye injection. A vortex ring is created during the bell contraction phase, but no vortex is created during the bell relaxation phase. 250 frames s−1 recording, 30 frames s−1 playback (MPEG; 1.6 MB).
Movie 2. Free-swimming Aurelia aurita. This video shows the jet-paddling swimming mode exhibited by Aurelia aurita, in which the wake is made visible by fluorescene dye injection. Vortex rings of opposing rotational orientation are formed during the bell contraction and relaxation phases, respectively. 30 frames s−1 recording and playback (MPEG; 3.4 MB).
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