Australian researchers have found that wrapping seal-shaped decoys in bright, horizontally striped LED lights can effectively deter great white sharks by disrupting their silhouette.

This innovative technique is based on the counterillumination phenomenon, where certain marine animals use light to obscure their outlines from predators.

The study emphasizes the importance of light pattern and brightness, with the optimal configuration being horizontally positioned lights to better obscure the decoy's outline.

Initial experiments indicated that fully illuminating the underside of a decoy was impractical due to high power requirements.

Researchers discovered that strobe lighting was less effective than continuous lighting, as the silhouette of the decoy could be seen between flashes.

Lead researcher Laura Ryan expressed enthusiasm about the findings, stating plans to develop prototypes for use on kayaks and surfboards.

Despite New South Wales having an extensive shark management program, including nets and drone surveillance, these measures cannot cover all surfing locations, particularly remote areas.

While shark bites on humans are rare, the aim of this research is to enhance safety for both surfers and sharks in ocean waters.

The next phase of research will involve creating a lightweight prototype surfboard equipped with LED lighting, which will be tested under safe conditions.

In 2023, there were 69 unprovoked shark bites globally, with the highest incidents reported in the US, Australia, and South Africa, resulting in 10 fatalities.

Australia has recorded over 1,200 shark attacks since 1791, with great white sharks responsible for 94 fatalities, highlighting the ongoing concern for ocean safety.

Marine biologist Chris Lowe cautioned that while these devices show promise, individuals should not overestimate their protective capabilities in shark-prone areas.