Between the mainland and Ramree lies a group of islands separated by deep, narrow, salt-water inlets, forming the north-eastern shore of Kyaukpyu harbour, which extends for nearly 30 m.
The coasts present a number of maritime inlets, forming inland bays, which communicate with the sea by channels of greater or less width.
In the north and south, however, this line is broken by the inlets of the sea which form the Frisian and the South Holland and Zeeland islands respectively; but the dunes themselves are found continued along the seaward side of these islands, thus indicating the original continuity of the coast-line.
The chief inlets are Wismar Bay, the Salzhaff, and the roads of Warnemnde.
The rugged Spanish coast is indented by many fjord-like inlets, especially in the west, where navigation is sometimes difficult and dangerous; but its rivers are comparatively unimportant.