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 Australia bay blue coastal-landforms erosion escarpment faulting faults foliage geological geology granite granitic gray grey hard hill iron iron-oxide landscape light natural nature outcrop rock rugged rust rusty scarp-face seascape slope steep-slope vegetation wavelets appearance backdrop background coastal contrast contrasting cool cooling dark darkening distance dunes edge edged edges environment environmental flowers foreground groundcover hardy Indian-ocean leafy leaves sand-dunes skies sky texture wallpaper water’s-edge waves winter wintry builders' rubble dumped low tide mangroves pebbles pollution receding tide rock formations rubble sand waste waterline alive animal aquarium aquatic arms biology brown bumps conservation coral creature echinoderms endoskeletons 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 distant expanse families open area people recreation relaxing strolling sunset waders wading walking bar barricade barrier beach-sands beams block blockade dark-ocean disturbed dry dry-sand erected erection fence fencing footprints obstacle outdoors outside perspectives public quiet sand-tracks sandy stays summer sun swimmers swimming tracks uneven view views warm wood wooden wooden-barrier aerial aerial roots glistening glossy mangrove growth ocean edge ocean waterline receded receding root network Roots salt-resistant sand dunes security strength strong support