A terrifying video captured piranhas in action during a massive feeding frenzy, and it’s enough to make us want to avoid ever swimming in rivers. The footage, posted on The Daily Mail, shows fishermen attracting a piranha frenzy as they gut fish at a harbor on the Amazon River. As they toss guts and fish parts into the river, the murky water is churned up by the fierce thrashing of the dangerous carnivores.
It’s easy to assume that the piranha attacks show in films is exaggerated for entertainment and shock value, but this video proves it’s actually an accurate depiction. The instant the flesh is in the river, the piranhas begin to devour it. The calm water of the river turns frothy in less than a second, and the meat disappears as the fish rip it apart with their infamously razor-sharp teeth.
Piranhas, native to South America, are attracted to the activity of the group—so with every piece of fish thrown into the river, more are probably drawn to the area.
The video was a shot by Joao Antonio Cruz Junior, who was watching the fisherman clean up their catch of the day. His video has since gone viral. Posted a week ago, it already has over five million views on YouTube.
You can check it out for yourself in the video above.