Cajuúna River

The Cajuúna River (Portuguese: Rio Cajuúna) is a river of Marajó, which itself is an island in the Amazon Delta. It is located in the state Pará in northern Brazil.

The Cajuúna is a right branch of the Charapucu River. It flows in a generally northern direction until splitting into several river channels that form various islands between them:^[1]

• A channel called the Cajari River flows westward. An anabranch called Furo Maguari splits off at the left, forming an area called Cajari Island. The Cajari channel flows into Vieira Grande Bay where it encounters an island that is somewhat confusingly also called Cajari Island. Here the channel splits into two again, where the right branch is another furo called Furo São Domingos.
• A channel called the Santana Channel (Canal do Santana) flows further north until the town Afuá, where it forms a bay that also receives waters from the Marajozinho River. The town is heavily influenced by the tides of these rivers.^[2]

Here the river system splits further:

• The Afuá Channel (Canal do Afuá) flows northwards into Vieira Grande Bay opposite the islands Camaleão Island^[3] and Ilha das Pacas.
• A channel called Furo Piraiauara flows to the west, also into Vieira Grande Bay, south of the areas called Franquito Island and Piraiauara Island.

• List of rivers of Pará