beach coast coastline color colored colors colour coloured colours layers levels light low-tide ocean open-area rocks rocky rough sand sea seashore seaside shade shadows shapes shore shoreline Sizes spray stones stony sunlight sunshine surf surge surging tidal tides variety water waves wet abstract broad cascading cool cooling dark downhill downwards edges fast-flowing flow flowing moving multi-level multiple-levels park peace peaceful public reflecting reflections ripples rippling running steps stonework stream streaming surface surfaces textures waterfall wide green greenery growing growth ocean-edge ocean-waterline plants scrub shrubbery shrubs tide trees aerial aerial roots low tide mangrove growth mangroves natural ocean edge ocean waterline pebbles receded receding receding tide root network Roots salt-resistant security strength strong support waterline birds dune-flora dunes grass grasses gulls pelicans sand-dunes Sandbar seabirds seagulls vegetation waterbirds black cloud clouds contrast contrasting dark-clouds darkening darkness dismal distant disturbing doom dramatic dusk evening foreboding formations frightening gloom gloomy gray grey grim horizon islands lighting moody mountains nature seascape skies sky sombre spreading storm stormy threatening weather wintery wintry aggressive Australian chroicocephalus-novaehollandiae city common edge edging fountain gray-and-white grey-and-white Larus-novaehollandiae Noisy prolific scavengers screeching silver-gull splashing standing wading waiting watching