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Flying fish in motion: A flying fish swims below the surface in the Gulf Stream late at night, offshore from Palm Beach, Fla., August 18, 2017. Moving its tail fin up to 70 times per second, a flying fish can reach an underwater speed of nearly 60 kilometers per hour. Angling itself upwards, it then breaks the surface while still propelling itself along by rapidly beating its tail underwater, before taking to the air and gliding – successfully escaping predators such as tuna, marlin and swordfish. (Photo by Michael Patrick O'Neill/World Press Photo)
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