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Swarms Facts

On the islands of Palau, tiny land-locked lakes are home to the jellyfish.  Each day, the jellies make a half mile migration across the lake.  They move to avoid a  lethal enemy - the sea anemone.  A jellyfish snared by the stinging tentacles is slowly digested by the anemone and helpless to escape other hungry marauders.  A seemingly passive swarm navigates using the sun.  Swimming east in the morning and west in the afternoon ensures the jellies always encounter a shadow before the actual side of the lake.  A single swarm contains up to 24 million jellies.

On the islands of Palau, tiny land-locked lakes are home to the jellyfish.  Each day, the jellies make a half mile migration across the lake.  They move to avoid a  lethal enemy - the sea anemone.  A jellyfish snared by the stinging tentacles is slowly digested by the anemone and helpless to escape other hungry marauders.  A seemingly passive swarm navigates using the sun.  Swimming east in the morning and west in the afternoon ensures the jellies always encounter a shadow before the actual side of the lake.  A single swarm contains up to 24 million jellies. (View larger version)

Photograph by Getty Images

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