Of or relating to the shore, especially the seashore.

A shore. / The zone of a coast between high tide and low tide levels.

plural of littoral

The tendency for economic development, urbanization etc to cluster along a coastline

(of a tidal coast) The intertidal zone / (of a non-flowing, non-tidal body of water) The zone of shallow water to the limit at which plants root.

plural of littoral zone