Scientific Name: Pygocentrus piraya
Common Names: Piraya Piranha
Distribution: Only found in the Rio São Francisco in Brazil.
Size: 16 inches (Captive), 24 inches (Wild)
Captivity: At least 40 gallons per piraya is needed, the more gallons per fish the better. As a shoaling fish, it is recommended that they be kept in at least groups of four, although this is normally not possible due to their size. A powerful and efficient filtration system is especially needed due to their large waste. A temperature of 24-30C, and pH of 5.5-7.5 is required.
Personal Comment: This is the king of the Pyocentrus species, and arguably the king of the entire piranha species in terms of size and possible aggression. These are the least skittish of the Pyocentrus species, and certainly the biggest. However for them to reach their potential size, a large tank and excellent water quality is needed.