1) Fish genus 2) Genus serrasalmus 3) Piranhas 
Serrasalmus is a genus of piranhas. They are collectively known as pirambebas; the `typical` piranhas like the Piraya Piranha are nowadays placed in Pygocentrus. Like all piranhas, Serrasalmus are native to South America. These fish are predatory, have sharp teeth and generally have a rhomboid shape. In some, the shape is more ovoid, particularl.....
[n] - piranhas
genus Serrasalmus noun piranhas