abstract alone animal artwork background ball beach brown bubbler crabs build burrow coast construction crab crab markings Crustacean design grain hidden hiding hole home imagination industrious marine nature ocean pattern play round sand sand balls Sand bubbler crabs sand bubblers sand marbles sandy sea shell shell fragments shells small sphere spheres spotted texture tiny tropical wildlife coastline color colored colors colour coloured colours distance distant expanse footprints growing growth industrial activity industrial area Jetty layers levels low tide mangroves natural outcrop pebbles people plants pollution prints receding receding tide recreation relaxing rock formations rocks rocky rough seashore seaside shade shadows shapes ships shore shoreline Sizes stones stony strolling sunlight sunshine tidal tides variety waders wading water waterline beachfront sea view sea wave wave blue clouds summer sunset waves yellow sun