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

require vinegar treatment, while stingray injuries often respond to hot water immersion.

Even basic first aid knowledge can make a big difference while waiting for medical help.

COMMON MARINE HAZARDS EXPLAINED

• JELLYFISH

Jellyfish are one of the most common reasons purple flags are raised.

Their tentacles contain microscopic stinging cells that can cause continue reading …