The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
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The largest breed of rabbit is the Flemish Giant.
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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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Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
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The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
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Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
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There's a rare breed of pig that looks like a sheep.
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