Indeed, the Black Sea is unique among major bodies of water for its two layers. The top layer, fed by freshwater from rivers like the Danube, the Dniester and the Dnieper, teems with life.

Third, they should optimize the commercial transit capabilities of rivers flowing into the Black Sea—particularly of the Danube. In developing the framework for a free and open Black Sea ...

The Black Sea faces a long-term danger from naval mines ... was a YaM mine — a Soviet-era anchor-type river mine that floats a few feet below the surface. "So was it actually floating mines ...

has become an export hub as an alternative to the major Black Sea ports. Grain shipments arrive by truck and are loaded onto barges that travel down the river to the Romanian port of Constanta ...