Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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Two dogs were among the Titanic survivors.
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Dolphins have names for one another.
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It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
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When dragonflies mate, their tails form a love heart.
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Rex the German Shepherd was a rescue dog with a bad temper. He refused to be fed by humans and would attack strangers, but he’s a changed dog after falling in love with Geraldine the goose!
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Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
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Cats recognise the voice of their owner, but never evolved to care.
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