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.
Nai Aru Lagoon of water birds including ducks, gulls, terns and other shorebirds. Nai Aru Lagoon Nai Aru Lagoon (or Nay Aru Lagoon) is an estuarine lagoon in Mullaitivu District, north-east Sri Lanka. The lagoon is fed by a number of small rivers, including Nay Aru (Mullaitivu). It is linked to the sea by a narrow channel to the south that is very often blocked by a sand bar. The lagoon's water is brackish. The lagoon is surrounded by dense forest, scrubland, rice paddies and coconut palm. The land is used for prawn fishing and paddy cultivation. The lagoon has extensive sea grass