The river acts as a vital transition zone between the Amazon rainforest and the Cerrado savanna . It is home to more than 700 bird species and 300 fish species, including the giant otter, the pirarucú (one of the world's largest freshwater fish), and the endemic Araguaia River dolphin . Historical and Cultural Context
The basin faces severe pressure from deforestation driven by cattle ranching and soybean production. Current government plans for additional dams and industrial waterways ( hidrovias ) are highly controversial due to their potential impact on the river's fragile ecosystems. Araguaia River - Students | Britannica Kids | Homework Help araguaya river
Midway through its course, the Araguaia splits into two channels to encircle Bananal Island ( Ilha do Bananal ). Covering over 200 miles in length, it is recognized as the largest fluvial island on Earth. The river acts as a vital transition zone