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Rio Guaporé at Pontes e Lacerda (Brazil)
|- left||Alegre River, Verde River, Paragúa River, Río Blanco, Machupo River|
|- right||Guatire River, Branco River, Corumbiara River, Colorado River, Massaco River, Cabixi River|
|- elevation||631 m (2,070 ft)|
|- location||Mamoré River, Brazil/Bolivia|
|- elevation||131 m (430 ft)|
|Length||1,530 km (950 mi)|
|Basin||266,460 km2 (102,880 sq mi)|
|- average||1,530 m3/s (54,030 cu ft/s)|
Guaporé River (Portuguese: Rio Guaporé) is a river in western Brazil and northeastern Bolivia. Its Bolivian name is Río Iténez. It is 1,530 km (950 mi) long; 970 km (600 mi) of the river forms the border between Brazil and Bolivia.
About 260 fish species are known from the Guaporé River basin, and about 25 of these are endemic. While many fish species in the river essentially are Amazonian, the fauna in the Guaporé also has a connection with the Paraguay River (part of the Paraná River basin). The Guaporé and the Paraguay, while flowing in different directions, originate in the same region of Brazil. Among the fish species shared between these are the black tetra and black phantom tetra, which both are important in the aquarium industry.
- Robin Sears and Robert Langstroth. "Central South America: Northern Bolivia". Tropical and Subtropical Grasslands, Savannas and Shrublands. WWF. Retrieved 7 October 2012.
- Hales, J., and P. Petry (2013). Guapore - Itenez. Freshwater Ecoregions of the World. Retrieved 28 February 2013
- Froese, Rainer and Pauly, Daniel, eds. (2013). "Gymnocorymbus ternetzi" in FishBase. February 2013 version.
- Froese, Rainer and Pauly, Daniel, eds. (2013). "Hyphessobrycon megalopterus" in FishBase. May 2013 version.