Swimmers and Shark Deterrents: Do They Really Work?
A Growing Concern
Sharks pose a real threat to swimmers along California's coast. After a shark attack near Lovers Point in 2022, the Kelp Krawlers swim club started using shark deterrents. But do these devices truly keep sharks at bay?
A Tragic Incident
Erica Fox, a member of the Kelp Krawlers, was found dead near Davenport in December 2025. She was wearing a shark deterrent, raising doubts about their effectiveness.
Types of Deterrents
Shark deterrents come in various forms:
- Magnets
- Electricity
- Scents
Sharkbanz is one of the most popular brands, claiming to reduce the risk of shark encounters. However, the company admits it can't prevent ambush attacks.
Mixed Research Findings
A 2018 study found that most deterrents don't work well. Only one device, Freedom+Surf by Ocean Guardian, showed a significant reduction in shark interactions. Sharkbanz and Rpela disputed these findings, citing their own studies.
Expert Opinions
Carl Meyer, a marine biologist, points out a major flaw in these devices. The electromagnetic field they create is only effective at very close range. By the time a shark detects it, it might be too late.
Swimmers' Perspectives
Many swimmers are aware of the limitations of these devices but still use them.
- Lisa Jensen, a Kelp Krawlers member, admits they give a false sense of security.
- Sharen Carey, another member, says they use the devices even though they know they might not work.
Industry Comparison
Sharkbanz compares their devices to seat belts or bike helmets. They argue that these devices reduce risk but can't protect someone all the time. After Fox's death, the company stated there's no way to prevent ambush attacks.
The Reality
Shark attacks are rare but can be deadly. Shark deterrents might not be the solution people hope for. Swimmers should be aware of the risks and take precautions.
