What makes Tongareva, an inhabited atoll of the Cook Islands, a hotbed for shark activity? The National Geographic Pristine Seas team set out to understand shark abundance in waters that have supported their communities for centuries and their role in maintaining its ocean reef ecosystem. This three-week expedition was the second stop on the 5-year Global Expedition aboard the Argo. The team partnered with National Geographic Explorer Jess Cramp, leader of Sharks Pacific, along with the Governme