Jellyfish Lake, located on the Pacific island of Palau, is home to millions of jellyfish. Many years ago, sea levels dropped and the jellyfish were trapped in the basin. The lake houses no predators, and the jellyfish’s sting has weakened. Jellyfish Lake is now a popular tourist attraction where snorkelers can swim among the jellyfish. Explain how Jellyfish Lake is evidence for evolution.
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