The video shows a whole-field view of an Aurelia aurita jellyfish swimming through a region of dye introduced above the body.

Many larger (5 cm to over 2 m) jellyfish generate vortex rings of opposite rotational sense during the contraction and relaxation phases, called starting and stopping vortices, respectively. The downstream propagation of the combined wake vortex rings is reduced by the interaction of the starting and stopping vortices. It is hypothesized that this reduced motion of the wake vortex rings away from the animal may be useful for keeping prey captured within the vortices closer to the feeding appendages below the animal.