The piranha is a small, carnivorous fish found mainly in the rivers and lakes of South America. Known for its sharp teeth and powerful jaws, it has a reputation for being fierce and aggressive. Piranhas often travel in schools, which helps them hunt and protect themselves from larger predators. Despite their fearsome image, piranhas are not always dangerous to humans. They typically feed on smaller fish and plant matter. In fact, many species of piranha are quite shy and avoid confrontation. Their unique adaptations make them fascinating creatures in the diverse ecosystem of the Amazon River.