The Araguaia River is a major river in Brazil, flowing through the central part of the country. It is approximately 2,627 kilometers long and is a significant tributary of the Tocantins River. The river is known for its diverse ecosystems, including wetlands and forests, which support a variety of wildlife. The Araguaia River is an important waterway for transportation and fishing in the region. It also serves as a natural boundary between the states of Goiás and Mato Grosso. The river's banks are home to several indigenous communities, who rely on its resources for their livelihoods.