Tidelands, also known as intertidal zones, are areas of shoreline that are exposed during low tide and submerged during high tide. Synonyms for tidelands include littoral zone, intertidal zone, foreshore, and tidal flats. Littoral zone refers to the area between the high and low water marks on a shoreline, where land meets water. Intertidal zone, like tidelands, is the area between the highest and lowest tide marks on a shoreline. Foreshore refers to the sloping part of the shore that lies between high and low water marks, where tidal changes affect the terrain. Tidal flats indicate the flat, muddy areas that are exposed during low tide and become submerged during high tide.