Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
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Dolphins have names for one another.
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Cat families usually play best in even numbers. Cats and kittens should be acquired in pairs whenever possible!
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Tigers, leopards, and jaguars love "Calvin Klein's Obsession for Men". The scent is used to attract animals to cameras in the wilderness, and was even a turn on for one pair of Jaguars who were subject to it.
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Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
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