Sharks are mysterious, mostly invisible and under-researched compared to top predators on land, but in July they fall under the spotlight in Sharkfest on National Geographic Wild (https://www.nationalgeographic.com/animals/topic/sharkfest) — in more than 80 hours of shows, lit by breathtaking cinematography.

A popular event in its ninth year, Sharkfest explores many of the unknowns about shark behaviour, including how they socialise and hunt...