While visiting the island nation of Palau earlier this month, a diver shot this impressive footage while snorkeling in Jellyfish Lake, a small body of water inhabited with an estimated 13 million golden jellyfish. Every morning the entire jellyfish population migrates from the east side of the lake to the west side, and then back again in the afternoon, causing a near constant flurry of activity as seen in the video. Unlike most jellyfish, this particular species has such a mild, almost undetectable sting that it can’t be felt on human skin, making it possible to swim through the school without being harmed. You can read a bit more about them in this fact sheet (PDF). (via Reddit)
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