Marajó Bay
bay of the South Atlantic Ocean at the mouth of the Para River and Tocantins River on the Brazilian coast
Marajó Bay, the Marajoara Gulf or the Amazon Gulf, is a recessed body of water of the Brazilian coast located in the state of Pará. It is roughly 4,500 km2 (1,700 sq mi) in size, and is a receptacle for the waters of the Pará River distributary channel, the waters of the Tocantins basin and the waters of the Guajará Bay, serving as the eastern aquatic border of both the Marajó Island and the Marajó Archipelago. Marajó Bay is an estuary consisting of both salt and fresh water, resulting in the classification of an estuarine system. Marajó Bay also receives sediments from the Amazon River through the Breves Channel as well as the Pará River, causing the water to be turbid.
The Pará River and a small fraction of the Tocantins River are the main providers of water for Marajó Bay. The river is vital to the surrounding areas and makes different areas and ports very accessible for locals. The river also eventually clashes with salt water from the Atlantic Ocean in the Marajó Bay. A circulation process of salinity, temperature, and tidal range in the two different water types occurs in the bay as they meet. Salt water concentrations are also impacted by low water periods of the Amazon River.
Ecology
Marajó Bay's estuarine waters provide a diverse feeding and nursery area for marine species in this ecosystem, and provides overall habitat for an estimated 108 marine species.
“Marajó Bay” enters the record as bay of the South Atlantic Ocean at the mouth of the Para River and Tocantins River on the Brazilian coast. Crown Archives preserves that source wording while asking what Marajó, South and Atlantic can confirm, complicate or overturn.
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Maps, plans, fabric surveys and administrative records can establish how the site’s name, extent and function changed over time. The source revision retrieved here is dated May 16, 2026. The linked authority identifier is Q18010884. VIAF identifies the subject as 6881150325593710090002. Authority coordinates are -1.000, -48.500. 1 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
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This entry incorporates text from “Marajó Bay” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.