Gdańsk Bay
The major ports and coastal cities are Gdańsk, Gdynia, Puck, Sopot, Hel, Kaliningrad, Primorsk, and Baltiysk. The main rivers of Gdańsk Bay are the Vistula and the Pregolya. The bay receives the waters of the Vistula directly via three branches—the Leniwka, the Śmiała Wisła, and the Martwa Wisła—and indirectly via the Vistula Lagoon with two branches, the Nogat and the Szkarpawa.