Rio Piraquê-Açu is the largest and most significant estuary along the northern coast of Espírito Santo, forming an expansive mangrove system together with the Rio Piraquê-Mirim between the municipality of Aracruz and the district of Santa Cruz. Located approximately 85 km north of Vitória, this rich estuarine environment is where freshwater and saltwater converge, creating a highly productive fishery that draws anglers from across the region. The river runs through a protected mangrove reserve spanning over 1,234 hectares, dominated by red mangrove (Rhizophora mangle) along the channel edges, with white mangrove (Laguncularia racemosa) prevalent in the upper estuary and black mangrove (Avicennia schaueriana) found in the lower and middle sections. The system is widely regarded as one of the premier snook fishing destinations in all of Espírito Santo, with fish regularly exceeding 10 kg. The river maintains an average depth of 2–6 meters, with a maximum depth reaching 12 meters in certain sections, and water temperatures ideally ranging between 22–27°C for productive fishing.