The Rio Mamanguape is a river in the state of Paraíba in northeastern Brazil. Its basin includes a significant protected area, the 4,052-hectare Guaribas Biological Reserve. The river flows into an estuary, where its dynamics are strongly influenced by tides and winds, which are key factors for local fishing techniques and strategies. This tidal influence is a primary consideration for paddlers, as water levels, currents, and the navigability of certain areas will vary significantly throughout the day. The estuary environment suggests a mix of riverine and coastal scenery, with associated mangrove ecosystems likely present. The river and its estuary are a working environment for local communities, including crab catchers and fishers, so paddlers should expect to share the waterway. The presence of the biological reserve indicates that certain areas may have protected status, requiring paddlers to be mindful of environmental regulations. Information on specific access points, recommended routes, water temperatures, water quality, or facilities for paddlers is not detailed.