The Gisia River is a significant waterway located in Papua New Guinea. It flows through lush landscapes and is known for its diverse ecosystems, supporting various plant and animal species. The river plays a crucial role in the local environment and is vital for the communities that depend on it for fishing and agriculture. The river's course is characterized by winding paths and occasional rapids, making it an important resource for transportation and trade. Additionally, the Gisia River contributes to the region's hydrology, influencing the surrounding wetlands and contributing to the overall health of the local ecosystem.