South American catfish climb rocks against currents in Brazil

Unique footage shows rare catfish "climbing" rocks against currents in Brazil. Thousands of South American catfish were observed ascending slippery rocks up to 4 meters high in the Aquidauana River basin. Researchers documented their unique climbing technique, involving stacking and using rock ledges. This behavior, observed during the rainy season, highlights the importance of understanding migratory fish and the impact of dams on their movements.