In Brazil Villagers Use a Natural Toxin to Paralyze Fish

In Brazil, indigenous peoples use a natural plant toxin to paralyze hundreds of fish. The fish are needed for a festival to appease a "spirit" who can protect them if things go well. For the festival to be a success, they need hundreds of fish to feed the dancers and act as an offering. The natural toxin is a great help, but the lake where they fish also contains piranha, electric eels and caiman.