The Baltic Sea is a unique and valuable habitat. Young readers can explore what makes it such an exciting sea with this book. They will learn how the Baltic Sea was formed, which fish, shells, jellyfish, and birds inhabit the area, why the Hühnergott has a hole, where to find amber, what thunderbolts are, and how coastal protection works. They will discover long beaches and steep coasts, the lagoon landscape, chalk cliffs, and the phenomenon of brackish water. Numerous photographs, drawings, and information boxes allow for quick and clear identification of shells and provide interesting facts.