What happens if you fall into a piranha river?

Piranha schools are about fear, not hunting. Then the river heats up. 🐟 Sources: • Biology Letters (Queiroz & Magurran, 2005) – Safety in numbers? Shoaling behaviour of the Amazonian red-bellied piranha: https://doi.org/10.1098/rsbl.2004.0267 • Studies on Neotropical Fauna and Environment (Mol, 2006) – Attacks on humans by the piranha Serrasalmus rhombeus in Suriname: https://doi.org/10.1080/01650520600630683 • AP via CBS News (26 Dec 2013) – 70 injured in carnivorous fish attack in Argentina: https://www.cbsnews.com/news/70-injured-in-carnivorous-fish-attack-in-argentina/ • Al Jazeera (26 Dec 2013) – Ferocious fish injure scores in Argentina: https://www.aljazeera.com/news/2013/12/26/ferocious-fish-injure-scores-in-argentina Video: • Opening shot (first ~2 s): AI-generated with Google Veo (Gemini). All other footage is real. • "Wuppertal - Zoo - Pygocentrus nattereri 01 (0) ies" – Frank Vincentz, CC BY-SA 3.0: https://commons.wikimedia.org/wiki/File:Wuppertal_-_Zoo_-_Pygocentrus_nattereri_01_(0)_ies.webm • "Pixabay video 156143 (piranha, fish, tooth)" – Engin_Akyurt, Pixabay Content License: https://pixabay.com/videos/id-156143/ • "View of the Amazon river in a boat ride (Pexels 7700052)" – Rafael Artud, Pexels License: https://www.pexels.com/video/view-of-the-amazon-river-in-a-boat-ride-7700052/ • "The drying river in the middle of a dense forest (Pexels 2973328)" – K, Pexels License: https://www.pexels.com/video/the-drying-river-in-the-middle-of-a-dense-forest-2973328/ • "Aerial view of busy river with swimmers (Pexels 39144378)" – Ferdie Cayanga, Pexels License: https://www.pexels.com/video/aerial-view-of-busy-river-with-swimmers-39144378/ Voice: generated with ElevenLabs (elevenlabs.io). Music: "Frame-Dragging" – The Grey Room / Density & Time; "Deep Space Sector 9" – Ezra Lipp (YouTube Audio Library). #shorts #funfact #notsofunfact #facts #piranha #amazon #river