Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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Dolphins have names for one another.
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The largest earthworm on record was found in South Africa and measured 22 feet.
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When Koko, the gorilla famous for knowing sign language, was asked where gorillas go after death, she responded by signing “Comfortable hole, bye.”
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When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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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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