Occurred on January 18, 2018 / Great Barrier Island, New Zealand
Info from Licensor: "Drone footage of mass shark sighting in the shallow waters of Great Barrier Island, 90km from Auckland City. The sharks were sighted basking in the sun close to the shore at a popular swimming beach. The footage was taken by teenager Zach Judkins, who noticed the sharks when he was out snorkelling in the bay. He used a drone to film the water and was shocked to discover the incredibly large number of sharks that had been in the water nearby at the time he was snorkelling."