appropriate-behavior appropriate-behaviour black blue care communication danger dangers denied no-diving not-allowed not-permitted permission-denied prohibited prohibition red risk risks risky shallow sign signs swimmers swimming warning water wet white appropriate behavior appropriate behaviour chinese english no diving not allowed not permitted permission denied rain rain-drops advice alert announcement be-careful beware caution communicating concern consumption dangerous health informing Look looking lookout rules safety undrinkable unhealthy warning-sign allowed bath bridge dive diving not ocean pier sea signpost swim warn dolphin Dolphins marine marine life porpoise sea life seaweed under sea under water undersea