Stonefish are members of the family Scorpaenidae, or scorpion fish. The family also includes lionfish. These fish are very good at hiding in their surroundings. The fins of these prickly fish carry poisonous venom. This article describes the effects of a sting from this kind of fish.
This article is for information only. DO NOT use it to treat or manage an actual stonefish sting. If you or someone you are with is stung, call your local emergency number (such as 911) or the National Poison Control Center at 1-800-222-1222.
Stonefish venom is poisonous.
Poisonous stonefish and related sea animals live in tropical waters, including off the warm coasts of the United States. They are also considered prized aquarium fish, and are found worldwide in aquariums.
A stonefish sting causes intense pain and swelling at the site of the sting. Swelling can spread to an entire arm or leg within minutes.
Below are symptoms of a stonefish sting in different parts of the body.
Airways and lungs
- Difficulty breathing
Heart and blood
- No heartbeat
- Irregular heartbeat
- Low blood pressure
- Collapse (shock)
- Severe pain at the site of the sting
- Whitened color of the area around the sting
- Change to the color of the area as oxygen decreases
Stomach and intestines
- Abdominal pain
- Fever (from infection)
- Muscle twitching
Seek medical help right away. Contact your local emergency services. Wash the area with fresh water. Remove any debris, such as sand, at the wound site. Soak wound in the hottest water the person can tolerate for 30 to 90 minutes.
Before Calling Emergency
Have this information ready:
- Person's age, weight, and condition
- Type of fish, if known
- Time of the sting
- Location of the sting
The National Poison Control Center (1-800-222-1222) can be called from anywhere in the United States. This national hotline number will let you talk to experts in poisoning. They will give you further instructions.
This is a free and confidential service. All local poison control centers in the United States use this national number. You should call if you have any questions about poisoning or poison prevention. It does NOT need to be an emergency. You can call for any reason, 24 hours a day, 7 days a week.
What to Expect at the Emergency Room
The health care provider will measure and monitor the person's vital signs, including temperature, pulse, breathing rate, and blood pressure. The wound will be soaked in a cleaning solution and any remaining debris will be removed. Symptoms will be treated as appropriate. Some or all of the following procedures may be performed:
- Blood and urine tests
- Breathing support, including oxygen, tube through the mouth into the throat, and breathing machine
- EKG (electrocardiogram, or heart tracing)
- Intravenous fluids (through a vein)
- Medicine called antiserum to reverse the effect of the venom
- Medicine to treat symptoms
- Tetanus shot, if necessary
Recovery usually takes about 24 to 48 hours. Outcome often depends on how much poisonous venom entered the body, the location of the sting, and how soon the person received treatment. Numbness or tingling may last for several weeks after the sting. Skin breakdown is sometimes severe enough to require surgery.
A puncture to the person's chest or abdomen may lead to death.
Auerbach PS. Envenomation by aquatic vertebrates. In: Auerbach PS, ed. Wilderness Medicine. 6th ed. Philadelphia, PA: Elsevier Mosby; 2011:chap 81.
Otten EJ. Venomous animal injuries. In: Marx JA, ed. Rosen's Emergency Medicine: Concepts and Clinical Practice. 8t ed. Philadelphia, PA: Elsevier Saunders; 2014:chap 62.
Update Date 7/14/2015
Updated by: Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.