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Fun fact 2 about Tocantins

Flavio Andre PonteFernandoHenriqueCardoso Palmas TO
river

The São Domingos karst in the upper Tocantins basin has more cavefish species than any other region in the Americas.

Tocantins
Brazil
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river

Tocantins

Brazil

Length
2,640 km
Mouth
Atlantic Ocean
Countries
Brazil
24th longest river in the world

The Tocantins River is a river in Brazil, the central fluvial artery of the country. In the Tupi language, its name means "toucan's beak". It runs from south to north for about 2,450 km (1,520 mi).

From the “Fauna” section

Text from Wikipedia, CC BY-SA 4.0.

Photo: Flávio André/MTur Destinos · Attribution