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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A group of unicorns is called a blessing.
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A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
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The largest breed of rabbit is the Flemish Giant.
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