Vistula Lagoon million. However, major ecological considerations stand in the way. For example, mammal migration along the lagoon could be disrupted. Also, the inflow of brackish waters from the Baltic sea could result in serious unbalancing of the lagoon's freshwater ecosystem. From 1772 until 1918, the lagoon was part of the Kingdom of Prussia, which had become part of the German Empire in 1871. Between 1920 and 1946 it was split between Germany and the Free City of Danzig. At present state since 1945 its eastern part belongs to Russia (formerly USSR), Poland has 43.8% of its area at lagoon's western side.
Marano Lagoon Marano-Grado Lagoon are: Marano Lagoon Marano Lagoon is a huge lagoon in northeastern Italy. It has a surface area of around 160 square kilometres (62 sq mi). Marano Lagoon stretches from Lignano Sabbiadoro to the east for nearly 90 km. It is considered the twin of the Venice Lagoon, that is located a few km to the west. Sometimes it is called "Marano-Grado lagoon", but geographically it is divided in two sections: lagoon of Marano and lagoon of Grado. The section usually called "Grado Lagoon" is an Italian lagoon located in the northern Adriatic sea, which extends from the "Fossalon"