Congo River's freshwater travels 800 kilometers into the Atlantic Ocean via massive eddies

The Congo River's freshwater is carried up to 800 kilometers into the Atlantic Ocean by massive ocean eddies. A 2026 study revealed that these giant eddies, some nearly 100 kilometers in diameter, trap the river's less salty water, transporting it far offshore. This phenomenon impacts ocean salinity, circulation, and marine ecosystems. The Congo is the world's deepest known river.