Lifeguards on a beach in North Carolina’s Outer Banks have posted a new purple flag that is adorned with images of a jelly fish and a stringray. The Virginian-Pilot reported Sunday that that the flag serves as a warning when the sea creatures are nearby. The purple flag expands warnings to swimmers beyond the red banner that’s already flown when rip currents are present. A yellow flag also warns of heavy shore break or dangerous currents. Purple flags are a common maritime warning. But David Elder, supervisor of Kill Devil Hills Ocean Rescue, said he asked a local business to add images of the creatures to be more specific.