Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
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Penguins have a gland above their eye that turns saltwater into freshwater.
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Whales and dolphins can't taste anything other than salt.
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The two oldest cats on record lived to 38 and 34 years old, both were owned by the same owner and lived off a diet of bacon, eggs, broccoli and coffee.
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The seahorse is the only fish to have a neck.
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Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
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Dogs have been man's pet for over 14,000 years.
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