The Most Common Marine Pests (And What to Do If You’re Stung)
Let me walk you through the most frequent purple flag culprits.
- Jellyfish (The Most Common)
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Jellyfish are found in oceans worldwide. Their tentacles contain nematocysts (stinging cells) that fire when touched.
Symptoms of a jellyfish sting:Immediate burning pain
Red, raised welts (often in a “whip” pattern)
Itching, swelling, numbness
Severe reactions: difficulty breathing, chest pain, muscle cramps (rare, but seek emergency care)
What to do:
Rinse with vinegar (if available). Vinegar neutralizes the stinging cells of many jellyfish species.
Do NOT rinse with fresh water (fresh water can cause unfired stinging cells to discharge, making it worse).
Remove tentacles with tweezers or a gloved hand (don’t use bare fingers).
Apply heat (hot water immersion or hot packs) – heat breaks down the venom proteins.
Take antihistamines for itching and swelling.
What NOT to do:
Don’t rub the area (
