Research has shown that piranhas will communicate with each other and have distinct sounds for face-to-face interactions, food competition, and chasing.
Coloration is primarily silver-gray with a red-tinged abdomen
Females generally have a more vibrant red colored abdomen than males
Sometimes this species has black spots appear behind their gills
Teeth are sharp and pointy, and jaws are strong
Despite their reputation as a predator, red-bellied piranhas are primarily a scavenger and forager. Believe it or not, they appear to travel in shoals for protection from their own predators, and have only rarely exhibited group hunting behavior.
That doesn’t mean red-bellied piranhas are shy though. With their pointy teeth and aggressive behavior, these fish will nip at the fins of much larger fish.
The red-bellied piranha population has not been evaluated by the International Union for Conservation of Nature (IUCN). As a result, the current status of the population is unknown.
Up to 20 inches (50 centimeters)
Insects, worms and fish
Freshwater river basins in northern South America