Shoreline lakes are generally lakes created by blockage of estuaries or by the uneven accretion of beach ridges by longshore. They include maritime coastal lakes, ordinarily in drowned estuaries; lakes enclosed by two tombolos or spits connecting an island to the mainland; lakes cut off from larger lakes by a bar. A gut is a narrow coastal body of water, a channel or strait, usually one that is subject to strong tidal currents flowing back and forth. Reeds morass wetland rush bed reed bed. Lagoon river meander lake sea sunset sunrise morning plain swamp.