Season 3 Episodes15
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On a remote Pacific island a mysterious lake lies hidden by dense jungle. Below the surface a gigantic shimmering phantom swims, tracking the sun. This weird life form is composed of jellyfish - millions of them - a boiling mass of medusae. Like the other
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"The Lost World Of Medusa" is episode 8 of Natural World season 3. It aired on December 23, 1984.