Rio Tibagi is a significant river system flowing through Paraná state in southern Brazil, serving as a left-bank tributary of the Paranapanema River, which itself drains into the upper Paraná River system. The river drains a diverse basin that supports one of the most species-rich freshwater fish communities in South America, reflecting the extraordinary biodiversity of the broader upper Paraná basin. The Tibagi basin encompasses a wide range of habitats — from headwater streams to broader lowland reaches — making it a compelling destination for anglers seeking a variety of tropical and subtropical freshwater species in a genuinely wild setting.