burst danger England english fields flood grass Great Britain lake landscape meadows natural nature pond pool river spate Sussex trees water winter barnacles Cirripedia coast Cornish cornwall low tide Mollusca mussels Mytilus rockpool rocks seashells sessile shellfish advice alert announcement assistance be-careful beware black buoyancy care caution circle circular communicating communication flotation-device information informing kisby-ring lettering life-preserver life-saving-buoy lifebelt lifebuoy lifering lifesaver message no-lifeguard perry-buoy personal-protective-equipment red rescue-aid rescue-device ring-buoy risk risks risky safety safety-device sign signage swim swimming swimming-pool warning warning-sign white abstract background black and white duotone lights magic magical metallic monotone reflection reflections refraction ripples shiny silvery watery waves autumn bush calm flower garden green leaves lily lush mirror park peaceful reeds reflect rhodedendron still tree colour colours conservation fresh fresh water gradient graphic moisture moisturiser rainbow ripple save the planet texture colors eroded erosion pebbles smooth stones underwater worn angles appearances artificial convincing decorative display elephant elephants greenery Indian elephants jungle light make-belief outdoors public realism realistic sunlight sunshine