How does the risk of a shark bite compare with other dangers?
In the United States, the chance of a beachgoer being attacked by a shark is put at about 1 in 11.5 million, while drowning kills around 300,000 people worldwide each year.
Guess first
?
Which one is it?
A shark bite is a very rare danger, and far rarer than the other ways people die at the coast. The Florida Museum of Natural History, home of the International Shark Attack File, compares shark deaths with other causes. More than 38 people a year die from lightning in coastal US states, it says, while fewer than one a year is killed by a shark in Florida. In the United States the likelihood that a person who goes to beaches will be attacked by a shark is 1 in 11.5 million, and the chance of being killed is less than 1 in 264.1 million.
Deaths per year in coastal US states: lightning against sharks in Florida
people per year
| Deaths per year | |
|---|---|
| Lightning (coastal states, more than) | 38 people per year |
| Sharks (Florida, fewer than) | 1 people per year |
Another comparison comes from the World Health Organization, which estimates that drowning causes around 300,000 deaths worldwide each year, with 92 percent in . By contrast, the shark file recorded 12 shark-related deaths worldwide in 2025.
Rare is not the same as zero, and the risk is not the same everywhere. In the southwest of Western Australia, the chance of a surfer being fatally bitten in winter or spring is put at 1 in 40,000, and for divers 1 in 16,000. That works out as three times the risk of a serious or fatal cycling accident for a surfer, and seven times for a diver.
George Burgess of the shark file summed it up: attacks are basically an odds game based on how many hours you are in the water.
Try it
How many beachgoers before one attack is expected?
y = 0.2x + 0
Challenge · Move the slider until the line reaches 1 expected attack at about 11.5 million beachgoers, the US figure. What chance per million does that make?
Quiz me
0/3
Recap
Match fear to size: sharks are rare killers, but risk is higher in some places and for some activities.
💡 A trick to remember it · Time in the water is the dial: the longer and the more exposed, the more the odds move.
Surprising fact · For divers in southwest Western Australia, the fatal-bite risk in winter or spring is about seven times that of a serious cycling accident.
Connects to
- 🎬 Did Jaws make people fear sharks, and did that change how they were treated?
- 🏖️ How often do sharks bite people, and why does it happen?
- 🚨 How can a 95%-accurate test be wrong 98% of the times it says yes?
- 🎲 How did an unfinished game of chance give birth to probability theory?
- ⚡ How does a thundercloud make lightning?
Sources (3)
No source, no claim. Every fact in this lesson (9 claims) cites at least one of these.