Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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Sharks have been on the planet longer than trees.
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The most expensive cow in the world was sold in 2009 for $1.2 million.
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The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
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Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
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