Land

•  Denmark (2)
•  Finland (5)
•  Germany (5)
•  Netherlands (2)
•  Norway (1)
•  Poland, Baltic states (2)
•  Russia (1)
•  Sweden (4)

Seas

•  Baltic Sea (10)
•  Gulf of Bothnia (2)
•  Gulf of Finland (2)
•  North Sea (4)