The red-bellied piranha is a freshwater fish found primarily in the rivers and lakes of the Amazon Basin in South America. It is known for its distinctive red or orange belly and sharp teeth, which help it catch prey. These fish typically grow to about 12 to 15 inches in length and are often recognized for their strong jaws and powerful bite. Despite their fearsome reputation, red-bellied piranhas are generally not aggressive towards humans. They are social creatures that often swim in schools, feeding on a diet of insects, plants, and smaller fish. Their behavior can change based on environmental conditions and food availability.