The list of marine molluscs of Brazil is a partial list of saltwater species that form a part of the molluscan fauna of Brazil.
This list does not include the land or freshwater molluscs.
Bounded by the Atlantic Ocean on the east, Brazil has a coastline of 7,491 kilometers (4,655 mi),[1] where most species listed herein can be found.
List of marine gastropods: Species of bivalves include:[16] Species of polyplacophorans include:[16][17] Lists of molluscs of surrounding countries: