At maturity, Black Piranhas can reach a size of two feet in the wild, though they are usually much smaller in captivity. The maximum documented captive length is a 16-inch individual that was housed in a 400-gallon tank. They have flat and round shaped bodies. Their bodies have a yellow brown to black tint, with golden reflective scales. Their dorsal fin is far back on the body, and is gray, while the caudal fin is small, relative to other Piranhas, and is also gray. Black Piranhas, however, are best known for their razor sharp triangular teeth, which do great when ripping through flesh.
At maturity, Black Piranhas can reach a size of two feet in the wild, though they are usually much smaller in captivity. The maximum documented captive length is a 16-inch individual that was housed in a 400-gallon tank. They have flat and round shaped bodies. Their bodies have a yellow brown to black tint, with golden reflective scales. Their dorsal fin is far back on the body, and is gray, while the caudal fin is small, relative to other Piranhas, and is also gray. Black Piranhas, however, are best known for their razor sharp triangular teeth, which do great when ripping through flesh.