Purple Flag – Dangerous Marine LifeIf a shark is in the water, then a red flag or double red flag will be hoisted. Knowing the meaning of each flag warning will help you and your family stay safe in and around the water.
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Most beaches will hoist a double red flag to close the beach if dangerous sharks are nearby. Purple flags usually indicates the presence of other marine life such as jelly fish, stingrays, sea snakes, etc.
Finally, a purple flag means that there is dangerous marine life out on the water or beach. This could mean jellyfish, stingrays, sea snakes, or other marine life except sharks. If a shark is in the water, then a red flag or double red flag will be hoisted.
Red flag is high hazard meaning high surf and/or strong currents. Yellow flag is medium hazard meaning moderate surf and/or currents. Green flag is low hazard meaning calm conditions, exercise caution. Purple flag means dangerous marine life spotted.
Black flags? Well, those are a no go. Black means the conditions of the sea are extremely dangerous-do not swim or enter the water. If you'd like to avoid the possibility of an incident occurring, please, do not swim. If you're ever unsure of the condition of a beach, go to the lifeguard stand and ask.