The Amazon River has the greatest freshwater output of any river in the world and is home to an incredible diversity of life. Our exhibit is much smaller, but it does provide a glimpse of a fish species native to the Amazon. The Red-Bellied Piranha is one of the approximately 30 species of piranhas only found in the Amazon River basin. Piranhas have a reputation for being the most ferocious freshwater fish. In reality, they are timid scavengers fulfilling a role similar to vultures on land.