Learn more about piranhas, why they have such a powerful bite, and why there are so many misconceptions around them. In 1914, former U.S. president Theodore Roosevelt was traveling in Brazil when ...

A fearsome shark bite crushes with raw power, yet a tiny piranha delivers unmatched strength for its size. Scientists compare ...

A fight between a shark and a piranha is what one would expect to read about in a thriller novel, but not in scientific fact.

A freshwater Amazonian fish has evolved scales with microscopic armorlike structures specially designed to resist a piranha's piercing bite, new research shows. Arapaima gigas is the largest — and ...

Piranhas are among the most feared freshwater fish in the world, known for their sharp triangular teeth and powerful jaws. Found mainly in South American rivers, these fish often swim in large shoals.

Bite force, a measure of the strength of an animal's bite, helps researchers understand a species' role in the ecosystem.