The mangroves of the east side of the Cuinarana River are protected by the Maracanã Marine Extractive Reserve.

[1] On the west side the mangroves are protected by the Cuinarana Marine Extractive Reserve.

[2] The west bank of the Marapanim River, and the peninsula to the left of the mouth of the estuary formed by the Marapanim and Cuinarana rivers is protected by the Mestre Lucindo Marine Extractive Reserve.

[4] The area around Rio Cuinarana has a low population, with about 18 people per square kilometre.

This article related to a river in Pará, Brazil is a stub.