Environment warm aquatic
Organization solitary, pack (2-4 swarms), or school (6-11 swarms)
Piranhas are deadly carnivores found only in warm waters, such as seas, lakes, rivers, and streams.
A piranha swarm’s diet consists mainly of other fish, though mammals, birds, and amphibians caught in the water serve as a fine meal too.
Piranhas are small, 8 to 12-inch long black or silvery-black fish with large bulging eyes and a tiny mouth lined with razor-sharp teeth. They are generally black or silver with a red underbelly or mottled red spots on their scales. Eye color is usually gray or silver.
Piranha Swarm from the Tome of Horrors Complete, Copyright 2011, Necromancer Games, Inc., published and distributed by Frog God Games; Author Scott Greene.