Red-bellied piranha | Smithsonian’s National Zoo and Conservation Biology Institute https://nationalzoo.si.edu/animals/red-bellied-piranha
True to their name, red-bellied piranhas have red undersides. Their bodies are gray and flecked with bright, silver scales. Native to the Amazon River basin, these fish are important scavengers. They tend to travel in schools of 20 or more.
Learn what else makes these animals unique.