White sharks are often considered solitary creatures, but a new study on Guadalupe Island off the coast of Mexico reveals a more nuanced picture: these apex predators display social behaviours and sometimes spend extended periods together – up to 70 minutes patrolling side by side is not uncommon, suggesting deliberate, non-random encounters.
The research team, led by FIU marine biologist Yannis Papastamatiou and doctoral student Sarah Luongo, employed an innovative combination of tracking technologies for the study: so-called “Super Social Tags” captured both movement profiles and interactions between the sharks. These tagged white sharks were monitored via cameras and sensors for up to five days. Particularly intriguing was the integrated receiver system, which could detect other tagged sharks in close proximity.
Individual Hunting Strategies and Social Benefits
The findings show that white sharks in the clear waters of Guadalupe adopt different strategies from their counterparts in South Africa or Australia. There, they blend into murky waters and rely on surprise attacks. Around Guadalupe, however, both prey and predator are equally visible, making hunting a real challenge.
Analysis of the footage revealed various hunting methods: some sharks preferred to hunt during the day in shallow water, others in deeper waters or at night. Prey such as turtles or sea lions often escaped the predators through clever evasion. This is precisely why social contacts among sharks could be crucial: as Papastamatiou notes, the animals may share information and advantages by staying close to successful hunters – without explicitly cooperating.
Although the number of sharks studied was limited, the findings add a new dimension to the image of the solitary apex predator. Advancing technology is enabling researchers to gain even deeper insights into the social behaviour of these fascinating animals in the future.
“The technology can now truly unlock the secret lives of these animals. We’re moving beyond simply tracking where they are and where they’re going. With better technologies, we can continue to answer more and more questions.” -Yannis Papastamatiou
