Marine Stings: Bluebottle and Jellyfish First Aid
Most stings in Australian waters hurt a lot and harm a little. A few, mainly in tropical northern waters, can kill. First aid depends on the culprit. This follows the 2025 ANZCOR guideline.
Quick answer: For a bluebottle sting, get out of the water, pick off tentacles and rinse with seawater, then soak in hot water (about 45°C, as hot as can be tolerated) for 20–30 minutes. No vinegar or urine: vinegar is for tropical box jellyfish only. Call 000 for trouble breathing, collapse or severe pain after a tropical sting.
The marine sting ladder
This ladder climbs by danger, not by price. Steps 1 and 2 cover most beach days; steps 4 to 6 are emergencies.
- Step 1 · Self-careAny jellyfish sting: out, rinse, pickGet out of the water. Rinse with seawater and pick off tentacles (fingers are fine). Don’t rub.
- Works
- Not tested in trials; sensible first step that stops more stinging cells firing
- Cost
- Free
- How long
- Straight away
- Watch for
- Fresh water and rubbing fire more stingers. Urine does nothing.
Urine has never helped anyone, in any situation, on any beach.
- Step 2 · Self-careBluebottle: hot waterSoak in hot water (about 45°C, as hot as can be tolerated without burning) for 20 to 30 minutes. A hot shower works. Use ice in a bag if hot water isn’t available or doesn’t help.
- Works
- Good pain relief in 87% at 20 minutes, vs 33% with ice (Australian trial)
- Cost
- Free
- How long
- 20 to 30 minutes
- Watch for
- Test the water on unstung skin first, especially for kids. No vinegar on bluebottles.
Vinegar is for chips and box jellyfish. Bluebottles want a hot bath.
- Step 3 · DoctorStonefish, stingray or other fish spines: hot water, then a doctorSoak in water as hot as the rescuer can comfortably bear, and get medical care.
- Works
- Hot water eases pain in most (case series, no trials); wounds and spines need checking
- Cost
- Free first aid; public hospital care is free with Medicare
- How long
- Soak until pain eases, then get seen
- Watch for
- Don’t pull out a large embedded barb: pad around it. Call 000 for a stingray wound to the chest or belly.
Shuffle your feet in the shallows. Stingrays hate surprises as much as you do.
- Step 4 · EmergencyBox jellyfish (tropical): 000, vinegar, CPRGet the person out of the water and call 000. Start CPR if they’re unresponsive and not breathing normally. Douse the sting with vinegar for 30 seconds, then pick off tentacles.
- Works
- No trials; fast CPR and hospital care save lives; vinegar evidence is mixed but still advised
- Cost
- Free first aid; ambulance fees vary by state
- How long
- Until help arrives
- Watch for
- Don’t use fresh water. Ice in a bag for pain.
Vinegar bottles on tropical beaches aren’t for chips.
- Step 5 · EmergencyBlue-ringed octopus, cone shell, sea snake: pressure bandageCall 000. Apply a firm pressure bandage over the bite and the whole limb, splint it and keep the person still. Give CPR if breathing stops.
- Works
- No human trials (animal studies); slows venom spread; breathing support saves lives while paralysis wears off
- Cost
- Free first aid; an elastic bandage for the kit costs about $10–20
- How long
- Until help arrives
- Watch for
- Bites can be painless. Paralysis can start within minutes.
Cute, small, pretty. Do not pick it up.
- Step 6 · HospitalHospital careAntivenom (box jellyfish, stonefish, sea snake), strong pain relief, breathing support, care for Irukandji syndrome, and wound care.
- Works
- Life-saving support; antivenom evidence is mostly case reports, and weak for box jellyfish
- Cost
- Free in public hospitals with Medicare
- How long
- Hours to days
- Watch for
- Irukandji: severe back or muscle pain, sweating or vomiting 20 to 40 minutes after a minor tropical sting.
The bit where the experts take over. Your job was steps 1 to 5.
Save your money
Popular, heavily marketed or often asked about, but the evidence is weak or says no.
- Vinegar on bluebottlesNot recommended for bluebottles: it can fire more stinging cells. Vinegar is for tropical box jellyfish only.
- UrineDoesn’t work and may fire more stinging cells. Unpleasant for everyone involved, and that’s the only thing it achieves.
- Fresh water, rubbing or sandAll can fire the stinging cells still stuck to the skin. Rinse with seawater and pick, don’t scrub.
- Pressure bandage for jellyfish stingsNot recommended for jellyfish. Pressure bandages are for blue-ringed octopus, cone shell and sea snake bites.
What you can do
- Swim between the flags. In tropical waters in stinger season (about November to May), wear a full-body stinger suit and swim in netted areas.
- Wear shoes on reefs and in rock pools. Never pick up an octopus or cone shell.
- Shuffle your feet in shallow water to warn stingrays.
- For advice, call the Poisons Information Centre on 13 11 26.
See your GP if
- A sting or wound becomes red, hot, swollen or oozing in the following days
- A spine or barb may still be in the skin
- An itchy rash returns at the sting site a week or two later
Call 000 for trouble breathing, collapse, a sting covering half a limb or more, or a sting near the eye. Also for severe back or muscle pain, sweating or vomiting starting 20 to 40 minutes after a minor tropical sting (Irukandji syndrome).
Common questions
Should you put vinegar on a bluebottle sting?
No. Pick off tentacles, rinse with seawater, then soak in hot water (about 45°C, as hot as can be tolerated without burning) for 20 to 30 minutes.
What is the first aid for a box jellyfish sting?
Get the person out of the water and call 000. Start CPR if they’re unresponsive and not breathing normally. Douse the sting with vinegar for 30 seconds, then pick off tentacles.
Does urine help a jellyfish sting?
No. Rubbing and fresh water can also fire more stinging cells, so avoid them.
What is Irukandji syndrome?
A reaction to a tiny tropical jellyfish, with severe back or muscle pain, sweating or vomiting starting 20 to 40 minutes after a minor sting. Call 000.
What is the first aid for a bluebottle sting?
Get out of the water, pick off any tentacles and rinse with seawater, then soak the area in hot water (about 45°C, as hot as can be tolerated without burning) for 20 to 30 minutes. A hot shower works. Use ice in a bag if hot water isn’t available. No vinegar. Call 000 for trouble breathing or collapse.
Helpful resources
- Beachsafe website and appPatrol times, hazards, weather and tides for Australian beaches, from Surf Life Saving. Free app.
- Surf Life Saving Queensland: Marine stingersWhat each stinger looks like, where it lives and the right first aid for it. Free.
Evidence and more information
- ANZCOR Guideline 9.4.5: First aid for marine envenomation
- Healthdirect: Jellyfish stings
- MJA: Hot water vs ice packs for bluebottle stings (2006)
maladywise.com/marine-stings/