- Piranhas travel in groups and usually prey on other fishes. They are attracted to the scent of blood and can reduce even a large animal to a skeleton in a short time.
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- The razor-toothed pirahnas of South America are the most ferocious freshwater fish in the world.
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- Pirahnas feed in shoals, sometimes numbering thousands.
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- Potentially one of the most dangerous species, S. nattereri attains a maximum length of about 60 cm (2 feet), but most species are smaller.
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- Piranhas are abundant in the rivers of eastern and central South America.
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- Piranhas also called caribe, or piraya, any of several species of carnivorous fishes of the genus Serrasalmus, in the characin family, Characidae.
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- On 19 September, 1981 more than 300 people were eaten by them when a boat capsized in Obidos, Brazil.
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