Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
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Dolphins have names for one another.
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Cats sleep for 70% of their lives.
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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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The reindeer is the only mammal that can see UV light.
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A dork is a whale's penis.
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