The Monster from the Paraibuna River(2021)

Original title: O Monstro do Rio Paraibuna

The story revolves around Francisco Guimarães, a biology teacher who investigates the emergence of mysterious mutant capybaras from the Paraibuna River, which have been attacking and killing local residents in a small town in Minas Gerais, Brazil. Branded as insane, what he discovers is truly terrifying: a pandemic is imminent.