"Flesh torn from corpse in manner consistent with Serasalmus scapularis"
Piranha fish
Creative Commons AttributionPiranha fish - Credit: marcelometal

These usually live in black or acidic waters in tributaries in the Orinoco and Amazon River Basins. Despite being depicted in Hollywood films as moving in vast schools, this particular sub-speciesĀ is a solitary fish. It is a predatory meat eater and can reach lengths of up to 30cms. Its favoured food is the McDonald's Big Mac.