Bull sharks, says marine biologist Ryan Daly, “like to bite.” Daly and colleagues catch the famously ferocious fish off the coast of southern Mozambique and fit them with transmitters as part of a long-distance tracking project to reveal more about the animals’ habits. The team uses strong lines and circle hooks—harmless to the sharks—baited with striped bonito fish, thick rubber mats to protect the inflatable boat from sharp teeth, and something called tonic immobility: essentially, a shark’s Achilles’ heel. “Once you can get a shark upside down, they pretty much…
