[4] The bay is thought to have been named in 1520 by members of Ferdinand Magellan's expedition, who attributed its nearly semicircular shape to the detachment of legendary Saint Brendan's Island from the South American mainland ("Samborombón" being a corruption of San Borondón).

[4] It also experiences a substantial flow of water coming out from the Río de la Plata into the Argentine Sea.

[12] It also serves as an important nursery habitat for fish species in the Río de la Plata estuary system.

[1] The southern shore includes Campos del Tuyú National Park, home to a population of rare Pampas deer.

[17] The Samborombón Bay coast is known for its excellent sport fishing, particularly in the waters near Punta Rasa and the town of General Lavalle, where large saltwater species such as black drum are abundant.