On some poorly researched trivia lists it is stated as a fact that a pregnant goldfish is called a twit. This is not true as goldfish lay eggs.
71
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
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A lion in the wild usually makes no more than twenty kills a year.
186
When cats are happy, they may squeeze their eyes shut.
10
Jellyfish as a species are actually older than dinosaurs and sharks.
383
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4