A piranha is a carnivorous fish known for its sharp teeth and a powerful bite. They are primarily found in the freshwater rivers and lakes of South America, particularly in the Amazon Basin. Piranhas are often recognized for their flat bodies and distinctive jaw structure, which allows them to efficiently capture prey. Although they have a reputation for being aggressive, piranhas typically display varying behavior based on species and environmental factors. Some species are also omnivorous, feeding on plant material when animal prey is scarce. Their fascinating biology makes them a point of interest in both culture and ecological studies.