The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
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The largest breed of rabbit is the Flemish Giant.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
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Dolphins have names for one another.
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When cats are happy, they may squeeze their eyes shut.
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