Piranha
(Pygocentrus nattereri)

Native to various South America countries primarily in warm freshwater basins.

Ranges from 15 - 35cm (6 - 14in) long.

Feeds on Insects, Worms, Crustaceans and Fish. Also feeds on Aquatic Plants and Fruits, Nuts or Seeds that may fall into the water. 

Lives for around 10 - 15 years.