The Baltic Sea is home to diverse range of species including birds, mammals, fish, crustaceans, mollusks, algae and seagrass. The unique salinity gradient and high variability in habitat types of the Baltic Sea have resulted in a greater variety of plants and animals than might be expected under such conditions. However, many species are still under threat due to eutrophication, climate change, and various human pressures. Many organisations and countries are working to protect this worthy environment. Mammals in Baltic Sea: Mammals in the Baltic Sea primarily consist of three main species: harbor seals, grey seals, and the occasional sighting of the ringed seal. These three species are really essential for the ecosystem. Fishes in Baltic Sea: The Baltic Sea is home to fish species like herring, cod, and salmon. Overfishing and pollution threaten these fish populations, making conservation efforts crucial for their survival. Plants in Baltic Sea: The Baltic Sea contains various types o...