beach coast coastline color colored colors colour coloured colours distance distant expanse footprints growing growth industrial activity industrial area Jetty layers levels low tide mangroves natural ocean outcrop pebbles people plants pollution prints receding receding tide recreation relaxing rock formations rocks rocky rough sand sandy sea seashore seaside shade shadows shapes ships shore shoreline Sizes stones stony strolling sunlight sunshine tidal tides variety waders wading water waterline activities activity beaches hot move on outdoor outdoors run running summer sun sunny swim swimming the active boy competition exercise fitness girl health lesson play plays ride roller roller skate roller-skate skares skate slalom sport sports train training action adult balance boat boats dangers enjoy entertainment expensive fast handling luxury manoeuvrability mobility motion motor-boat movement outside pastime popular power power-sport quick river riverside safety skill speed speed-boat transport transportation travel water-sports waterways wealth buoys city city-skyline cityscape culture Perth tourists