The largest breed of rabbit is the Flemish Giant.
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Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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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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Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
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Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
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