backdrop background beach coast coastal coastline colors colours conservation conserve conserving contrast contrasting cultivation dune-flora dunes environment environmental flora foliage grass grasses green greenery growing growth leafy leaves levels light natural nature ocean ocean-edge ocean-waterline plants salt-resistant sand sand-dunes scrub tides vegetation water waterline abandoned children color colored colorful colour coloured colourful empty fish fun game games kid kids multicolored multicoloured old outdoor park play playground riding rocker rocking sea swing toys urban used wheathered wood wooden birds gulls low tide ocean edge ocean waterline pelicans receded receding receding tide rough Sandbar seabirds seagulls tidal waterbirds activity evidence footprints grainy impressed impressions imprinted imprints indented patterns shadow Soil textures tire-tracks tracks tyre-tracks work workplace layers pebbles rocks rocky seashore seaside shade shadows shapes ship shore shoreline Sizes stones stony sunlight sunshine variety working ship blue coastline coastlines drop drops foam rock seagull splash wave waves white coastlines drops foam