appropriate behavior appropriate behaviour black care communication danger dangers deep deep water depth jellyfish risk risks sign signs stingers submerged objects swimmers swimming warning water white yellow action aquatic Atlantis Australia background bay beach beaches beauty blue breaking choppy coast coastal coastline crash creation cycle daytime ecology environment extreme foam Hawaii lake liquid marine motion move movement nature ocean ocean spray outdoor pacific pounding power primal queensland recreation ripples river sand scenic sea seaside shore shorebreak splash sports spray summer Sunshine Coast surf surfing swells swim tahiti tidal tide travel tropical tsunami turquoise wallpaper waterscape wave waves weather wet alligator amphibian animal carnivore croc crocodile darwin feed hungry hunter jaws jump killer large lizard massive mouth open reptile safari teeth waiting wide wild beak bird cob crowded Cygnus olor England english feathers flock Great Britain group head mute natural neck plumage preen swan uk waddle walk waterfowl Windsor peck calm clean clear water cool water fresh fun healthy holiday leisure outdoors palm trees palms pleasure relax relaxing safe shelter sunny trees denied not allowed not permitted permission denied prohibited prohibition red boy child enjoy enjoyment float island landscape rock rocky Sardinia seascape seawater shoreline snorkel snorkeller snorkelling teenager vacation youth rhythmic rocks spume abstract appearance aqua backdrop blue-green color colour light patterns pool reflection reflections surface swimming pool texture textures vibrancy vibrant water's edge wavelets