Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
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The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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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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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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Bats sleep 18-20 hours per day.
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