Did you know that...

Do you know that low biodiversity of marine fish species in the Baltic Sea is caused by low water salinity?

This is quite a surprising news for a layman – you would thought that the freshwater is needed to live! In the Baltic Sea we meet much fewer marine fish and plants than in the North Sea. The ones living in our sea are distinguished by wide toleration for salinity changes. Such organisms are e.g. cod, herring or prawn. There are fewer typically marine organisms (Gammarus, Saduria), however there are freshwater species at the shores and in bays, like perch, pond snail or roach.