A purple flag at the beach signals dangerous marine life—an often-ignored warning that could protect you from serious harm in the water

clouds.

No obvious signs of danger.

The beach may appear completely peaceful.

That creates a false sense of security.

Most marine hazards can’t be seen until it’s too late.

You usually won’t notice a stingray hidden beneath the sand.

You may not see jellyfish tentacles drifting nearby until they brush against your skin.

The purple flag exists because lifeguards continue reading …