Dike Kokaral is a levee across a narrow stretch of the Aral Sea, splitting off the North Aral Sea (also called "The Small Sea") from the much larger South Aral Sea ("The Large Sea"). The dike is conserving the dwindling waters of the Syr Darya river and maintaining (and attempting to revive) the damaged ecology of the North Aral Sea, at the expense of sealing the fate of the larger South Aral.