Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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Cats lose almost as much fluid in the saliva while grooming themselves as they do through urination!
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Penguins have a gland above their eye that turns saltwater into freshwater.
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Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
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One in three dog owners say they have talked to their pets on the phone.
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A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
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