A recent study published in the journal Animal Behaviour suggests that not all sharks conform to the stereotype of being solitary and aggressive predators. The research focused on bull sharks, a species traditionally viewed as one of the most aggressive sharks. Contrary to common belief, the study revealed that bull sharks exhibit social behaviors, form friendships, and engage in complex social interactions.
Lead author Natasha Marosi, a PhD student in animal behavior at the University of Exeter in the U.K. and founder of Fiji Shark Lab, conducted the study over six years at the Shark Marine Reserve in Fiji. The research involved observing 184 bull sharks during 473 dives and 8,192 minutes of underwater observations. The sharks were provided with food at a designated area, allowing researchers to closely study their behaviors.
The study found that the bull sharks displayed specific social patterns, such as swimming in synchronization and engaging in lead-follow behavior. Interestingly, the sharks showed a preference for associating with individuals of similar sizes and displayed a tendency to interact more with female sharks. Additionally, adult sharks were observed to form the core of the social network, with younger sharks being more social as they seek information crucial for survival.
While the study was conducted at a provision site where sharks were regularly fed, Marosi emphasized that the observed behaviors were natural and not influenced by the feeding location. Toby Daly-Engel, director of the shark conservation lab at the Florida Institute of Technology, supported this view, noting that the findings were consistent with previous studies using different tracking methods.
Understanding the social dynamics of sharks could provide insights into various aspects of their lives, including learning behaviors, mating patterns, and cooperative hunting strategies. This knowledge may also help in addressing the challenges sharks face due to human activities such as overfishing and pollution. By shedding light on the social nature of sharks, the research aims to change the perception of these creatures from mindless predators to social beings with their own version of friendship.