Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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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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Denmark has twice as many pigs as there are people.
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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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The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
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