A purple flag at the beach is a crucial warning for swimmers, signaling the presence of potentially dangerous marine life. Unlike the more familiar red, yellow, or green flags that indicate water conditions and currents, the purple flag warns of marine pests such as jellyfish, stingrays, or other harmful creatures. It’s the ocean’s way of communicating hidden dangers beneath the surface.

So, the next time you spot a purple flag fluttering in the wind, remember it’s a sign to stay alert and be cautious while enjoying the water.