Piranhas are indigenous to the Amazon basin, in the Orinoco, in rivers of the Guianas, in the Paraguay – Paraná, and the São Francisco River systems, but there are major differences in the species richness.

Apr 17, 2026 · Piranhas have survived in these rivers for millions of years, not because they are mindless killers, but because they are adaptable, social, and ecologically vital.

Jul 3, 2026 · Piranhas range from northern Argentina to Colombia, but they are most diverse in the Amazon River, where 20 different species are found. The most infamous is the red-bellied piranha …

Apr 8, 2025 · Take piranha fish, a toothy South American freshwater fish that has been the subject of not one, not two, but five Hollywood horror movies. Sure, they've got big teeth, but are piranhas really as …

Jun 22, 2022 · Piranhas are famed for their fierce demeanor, sharp teeth, and outsized appetites, yet they are less dangerous to humans than commonly believed.

The red-bellied piranha, also known as the red piranha (Pygocentrus nattereri), is a species of freshwater ray-finned fish belonging to the family Serrasalmidae, which includes the pacus, piranhas …

There is believed to be somewhere between 30 and 60 different piranha species. However, the exact number is unknown, debated and not yet scientifically proven. There are over 20 different species …

Mar 2, 2025 · How dangerous are piranhas? With their sharp teeth and strong bite force, piranhas are formidable but not as deadly as popular opinion might suggest. While capable of inflicting serious, …

Jul 8, 2014 · Here are 14 fun facts about the freshwater fish: 1. Piranhas’ bad reputation is at least partially Teddy Roosevelt’s fault. When Theodore Roosevelt journeyed to South America in 1913, he...

Known as sand piranhas, Excirolana chiltoni are tiny crustaceans that nibble at your feet – and draw blood – if you hang out on the wet sand at the beach. Th...