A new species of jellyfish has popped up in the Adriatic Sea, leaving scientists a bit surprised, National Geographic reports. Discovered only a year ago in one of the best studied bodies of water in the world, researchers don’t think Pelagia benovici could have avoided detection for this long. Instead, they think the tiny jellyfish—described in Zootaxa—was transferred to the area recently through a ship’s ballast water system, a tank that intakes and outputs water from region to region to help maintain buoyancy.
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