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Title: Jellyfish propulsion

Description: Propulsion of a small (~5 mm) species of jellyfish that cruises as fast as or faster than most predatory bony fish, when measured in body-normalised units (that is, greater than 10 body lengths per second). The flow visualization of the wake reveals successive vortex rings. It shows a closeup of a valve-like flap on the animal body that interacts with the vortex ring during its formation.

Credits: John O. Dabiri1, Jack Costello2, and Sean Colin3 1Graduate Aeronautical Laboratories & Bioengineering, California Institute of Technology; 2Providence College; and 3Roger Williams Uni


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