The piranha (also known as the caribe) is a ferocious, schooling, fresh-water fish. It is native to warm lowland streams and lakes in South America, east of the Andes Mountains. Piranhas have been introduced to other places, including Northern Brazil, Hawaii, and parts of Central and North America. There are many species of piranha; they belong to the genera "Pygocentrus" and "Serrasalmus". They reproduce by laying eggs.