The most important fact about shark bite fatalities is this: most victims do not die from the bite. They die from blood loss. That distinction matters enormously because it means first aid applied in the minutes immediately following an incident, before any ambulance, before any lifeguard, is the variable that most determines whether a victim survives.
Every ocean athlete should know this information. You may never need it. If you do, you will have no time to look it up.
Note: This article is for general information only. It does not replace formal first aid training, and we strongly encourage all ocean users to complete a recognised first aid course that includes bleeding control.
The Critical Window
Arterial bleeding from a major limb wound can cause fatal blood loss in under five minutes. The femoral artery in the thigh, the vessel most commonly involved in serious lower limb shark bites, can empty the body of life-sustaining blood volume within that window if not controlled.
The emergency services response time to remote surf breaks, offshore dive sites, and rural coastline in Australia can be substantially longer than five minutes. This is not a criticism of emergency services, it is geography. It means bystanders on the scene are almost always the difference between a survivor and a fatality.
Step One: Get the Victim Out of the Water
The priority before any other first aid intervention is removing the victim from the water and getting to shore or a stable surface. Do not attempt to administer first aid while both of you are in the ocean. Move quickly and calmly.
Step Two: Stop the Bleeding, This Is Everything
Once on shore or in a boat, stopping the bleed is the only thing that matters. Everything else is secondary.
For wounds on limbs, arms and legs, the current evidence strongly supports tourniquet application as the most effective intervention for arterial bleeding.
Apply the tourniquet at least five centimetres above the wound, between the injury and the heart. Tighten it until the bleeding stops. Write the time of application on the patient's skin or note it clearly. A properly applied tourniquet buys at least three hours before tissue damage becomes a significant concern, far more time than it takes emergency services to arrive in most Australian coastal situations.
If no purpose-built tourniquet is available, improvise with the most rigid, wide material to hand: a belt, a neoprene strip cut from a wetsuit, or a surfboard leg rope. Note that research published in Emergency Medicine Australasia by Dr Nicholas Taylor at ANU found that an improvised leg rope tourniquet reduced blood flow by only 43.8 per cent on average, not enough. A proper tourniquet or the manual pressure technique described below is strongly preferable.
The ANU Manual Pressure Technique
For bites to the upper leg where a tourniquet may be difficult to apply effectively, Dr Taylor's research found a practical alternative. Make a fist and push hard into the midpoint between the hip and the groin, directly over the femoral artery where it passes through the pelvis. Applied with full bodyweight, this technique stopped 100 per cent of blood flow in 75 per cent of study participants and reduced flow by an average of 89.7 per cent overall, outperforming improvised leg rope tourniquets significantly.
The instruction is simple enough to remember under stress: push hard between the hip and the groin.
For Wounds to the Torso or Areas Where a Tourniquet Cannot Be Applied
Wounds to the torso, neck, or shoulder cannot be managed with a tourniquet. For these injuries, the primary intervention is wound packing, pushing a haemostatic dressing, gauze, or any clean absorbent material directly into the wound cavity and applying sustained, firm pressure. The goal is to create mechanical resistance to blood flow within the wound itself.
Do not remove the material once it is packed in. Add more on top if soaking occurs, but maintain the packing in place.
Step Three: Manage Shock
Blood loss leads to hypovolemic shock, a collapse in circulatory pressure that is itself life-threatening. Signs include pale, cold, clammy skin; rapid shallow breathing; confusion; and loss of consciousness.
Lay the victim flat. Keep them warm, a wetsuit, towels, a thermal blanket, or any available insulating material. Talking to them calmly and continuously serves both reassurance and monitoring purposes.
Do not give water or food. Do not elevate the legs if spinal injury is possible (as may be the case in a high-energy incident).
Step Four: Call for Help Immediately
Call emergency services. Provide your location as precisely as possible, a beach name, a GPS coordinate if you have it, a landmark. Activate any emergency beacon (EPIRB or PLB) if you are in a remote location.
What to Carry in the Water
The evidence is clear that having purpose-built bleeding control equipment accessible at the beach dramatically improves outcomes. A basic shark bite first aid kit should include a commercial tourniquet (the CAT, Combat Application Tourniquet, is widely regarded as the most reliable), haemostatic dressing, compression bandages, and gloves.
Wetsuits with bite-resistant properties also affect the first aid picture directly: a bite-resistant wetsuit that reduces laceration severity reduces the volume of blood loss from the initial bite, extending the window available for first aid intervention. It is not a substitute for carrying first aid equipment, it is part of the same preparedness logic.
Shark Stop bite-resistant wetsuits reduce the severity of shark bite injuries — the same injuries that cause most shark bite fatalities. Paired with proper first aid knowledge and equipment, they are part of how prepared ocean athletes approach the water. Explore the range here.