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.
Pelican Lagoon Migratory Bird Agreement (CAMBA). As of 1996, Black tiger snakes were reported as being present on the islands within the lagoon. The lagoon is reported as a breeding site for the little penguin. The lagoon supports a number of marine animal species considered to be commercially valuable. These include sand crab, king scallop, queen scallop, razorfish ("Pinna bicolor"), southern calamari, flathead, King George whiting, leatherjacket, red mullet, snook, Southern Sea garfish, tommy ruff, trevally and Western Australian salmon. The lagoon is also reported as being home for a pod of bottle-nosed dolphins. The lagoon was discovered by Flinders on 4