Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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A puppy is born blind, deaf, and toothless.
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Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
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Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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Condoms were originally made of animal intestines or linen.
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The colossal squid has the largest eyes in the world.
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