(a.) Under the shore.

aquatic balneal bank beach benthic zone berm bordering borderline boundary bounding coast coastal coastland coastline deep-sea determinant determinative determining embankment estuarine estuarine area extreme foreshore fringing frontier grallatorial intertidal zone ironbound coast lido limbic liminal limit limiting marginal natant natatorial natatory pelagic zone plage playa rimming riparial riparian riparious riverside riviera rockbound coast sands sea margin seabank seabeach seaboard seacliff seacoast seashore seaside shingle shore shoreline shoreside shoreward skirting splash zone strand sublittoral submerged coast supralittoral swimming terminal threshold tidal tidewater water-dwelling water-growing water-living water-loving waterfront waterside