The colossal squid has the largest eyes in the world.
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Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
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There's a rare breed of pig that looks like a sheep.
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The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
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The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
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