The Chuy River is a river located in South America, primarily forming the border between Brazil and Uruguay. It flows into the Atlantic Ocean and is approximately 100 kilometers long. The river is significant for its role in the local ecosystem and as a natural boundary between the two countries. The Chuy River is also known for its diverse wildlife and surrounding landscapes, which include wetlands and forests. It supports various species of fish and birds, making it an important area for biodiversity. The river's basin is vital for agriculture and local communities that rely on its resources.