Jellyfish stings are common in Australia, and many are painful rather than dangerous. But some tropical jellyfish can cause a life-threatening emergency. In first aid, the key step is knowing that treatment is different for a common Bluebottle Sting, a dangerous Box Jellyfish Sting, and other jellyfish stings.
What are jellyfish stings?
A jellyfish sting happens when tentacles touch the skin and release venom.
Some jellyfish stings cause only:
- pain
- red lines on the skin
- local swelling
Others can cause collapse, severe pain, or even cardiac arrest.
What symptoms can happen?
Symptoms depend on the type of jellyfish.
A Bluebottle Sting often causes:
- immediate intense pain
- a red line where the tentacle touched the skin
A Box Jellyfish Sting can cause:
- severe pain
- widespread symptoms
- collapse
- cardiac arrest
Some small tropical jellyfish can lead to Irukandji syndrome, where more severe symptoms may appear later.
What should you do in first aid?
The treatment depends on where you are and what type of jellyfish is involved.
If the sting is from a Bluebottle Sting or another common non-tropical jellyfish:
- Wash tentacles off with sea water, not fresh water.
- Remove any remaining tentacles carefully.
- Use hot water that is no hotter than can be easily tolerated for pain relief.
- Do not use vinegar on a bluebottle sting.
If the sting may be from a dangerous tropical Box Jellyfish Sting:
- Call
000immediately. - Get help from a lifeguard if possible.
- Start CPR if needed.
- Pour or spray vinegar onto the sting for at least 30 seconds.
- Remove tentacles after vinegar if possible.
When is it an emergency?
Treat a jellyfish sting as an emergency if the person:
- is in tropical northern waters and the jellyfish type is unknown
- has severe pain
- collapses
- has trouble breathing
- becomes Unresponsive
If severe allergy symptoms appear and a prescribed Adrenaline Auto-Injector is available, use it immediately. If you know the brand, follow the correct steps for EpiPen or Anapen.
How is this page different from other marine pages?
This page is the broader jellyfish overview.
- Bluebottle Sting covers the common painful local-sting pathway
- Box Jellyfish Sting covers the dangerous tropical emergency pathway
- Sea Creature Bites and Stings is the broader marine overview page
- Anaphylaxis covers the severe allergic-reaction pathway if the sting triggers it
Summary
Jellyfish stings are common in Australia, but not all need the same first aid. Bluebottle stings and dangerous box jellyfish stings follow very different pathways, so the right first-aid response depends on the likely type of jellyfish and where the sting happened.
Sources reviewed
Reviewed against Australian first aid and emergency guidance by the First Aid Glossary Editorial Team. This article is general information and does not replace emergency-operator directions, professional medical advice or hands-on first aid training.
