The Xingu River is a 1,640 km (1,020 mi) river in north Brazil. It is a southeast tributary of the Amazon River and one of the largest clearwater rivers in the Amazon basin, accounting for about 5% of its water.
Xingu River from space, downstream section.
Clearwater river (river type)
A clearwater river is classified based on its chemistry, sediments and water colour. Clearwater rivers have a low conductivity, relatively low levels of dissolved solids, typically have a neutral to slightly acidic pH and are very clear with a greenish colour. Clearwater rivers often have fast-flowing sections.
Like many clearwater rivers, the Xingu has sections with rapids that are home to many threatened rheophilic fish found nowhere else in the world
The confluence of the Madeira River and Aripuanã River (dark). Despite its colour on this photo, Aripuanã is clearwater, while the Madeira is whitewater
The zebra pleco is one of the many species, including several other catfish, that are restricted to clearwater rivers and threatened by dams
Potamotrygon leopoldi is part of a species complex of blackish river rays with contrasting pale spots from Brazilian clearwater rivers