Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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Jumping fleas can accelerate 50 times faster than the space shuttle.
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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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Dogs sometimes fake being sick to get attention.
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Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
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