or Corantijn or Coeroeni
River, northern South America.
Rising in the Akarai Mountains, it flows north for 450 mi (700 km) and empties into the Atlantic Ocean near Nieuw Nickerie, Suri. It divides Suriname and Guyana; residents of the latter are free to navigate the river but have no fishing rights. It is navigable to small oceangoing vessels for about 45 mi (70 km) to the first rapids at Orealla. The Courantyne basin remains largely undeveloped, with much of it remaining unexplored forest.