The Wadden Sea is the largest unbroken system of intertidal sand and mud flats in the world.
The Baltic Sea is home to more than 200 species of fish.
The Iroise Sea is part of the Celtic Sea and an area of exceptional marine biodiversity.
The Ligurian Sea is part of the Mediterranean Sea off the western coast of Italy.
The Norwegian Sea is a marginal sea in the North Atlantic Ocean, northwest of Norway.
The Ionian Sea is renowned for its clear blue waters and beautiful coastal landscapes.
The Alboran Sea is the westernmost part of the Mediterranean Sea.
The White Sea is a southern inlet of the Barents Sea located on the northwest coast of Russia.
The Barents Sea is located off the northern coasts of Norway and Russia.