Black Sea undersea river

The Black Sea undersea river is a unique underwater feature located in the Black Sea that is characterized by the presence of a submerged river system. It was first discovered in the late 1990s and is notable for its distinct characteristics, including a significant flow of freshwater and sediment being transported on the seabed, resembling a river. This underwater river is formed by dense, cold water that flows along the seafloor, creating a river-like channel as it moves.