beach coast coastline color colored colors colour coloured colours green greenery growing growth layers levels ocean ocean-edge ocean-waterline plants rocks rocky rough scrub sea seashore seaside shade shadows shapes shore shoreline shrubbery shrubs Sizes stones stony sunlight sunshine surface surfaces surfacing textured textures tidal tide tides trees varied variety water abstract appearance background changing currents dips distance distant ebb-and-flow expanse Indian-ocean light movement peaceful powerful pull ripples rippling salt-water sand scene texture vast vibrancy vibrant view views wavelets waves western australia Australia bay blue coastal-landforms erosion escarpment faulting faults foliage geological geology granite granitic gray grey hard hill iron iron-oxide landscape natural nature outcrop rock rugged rust rusty scarp-face seascape slope steep-slope vegetation builders' rubble dumped low tide mangroves pebbles pollution receding tide rock formations rubble waste waterline alive animal aquarium aquatic arms biology brown bumps coastal conservation coral creature echinoderms endoskeletons environment environmental fish five five-arms life marine outer-shell pitted pool rockpool save sea-creatures seastar star starfish tidepool tube-feet underwater wild wildlife adults children families open area people recreation relaxing strolling sunset waders wading walking aqua clear deep near shallow shallows Western-Australia aerial aerial roots dunes glistening glossy mangrove growth ocean edge ocean waterline receded receding root network Roots salt-resistant sand dunes security strength strong support accumulations algae attached clinging covered ebb-and-flood filamentous holdfasts low-tide pounding seaweed slimy slippery spray sticking stuck surf surge surging velvety wet