What is the main source of energy for the millions of golden jellyfish that inhabit Palau's famous Jellyfish Lake?
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The golden jellyfish in Palau's Jellyfish Lake have a fascinating relationship with symbiotic algae living in their tissues. Every day, these jellyfish migrate across the lake to follow the path of the sun, which allows their algae to photosynthesize and produce food for them. Because they rely on this internal food source, their stingers have evolved to be virtually harmless to humans. Photo: Lukas from Munich, Germany, Wikimedia Commons, CC BY 2.0.
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Source: Wikipedia (CC BY-SA)
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