Australia fends off shark bites with new tech and old

High above Sydney's beaches, drones are being deployed to monitor for sharks, one of the world's deadliest predators.

Australia's oceans are teaming with the animals and authorities are adopting a multi-layered approach to keeping people safe. It includes not just drones, but also shark trackers and bite-resistant wetsuits. Such swimwear may reduce injuries and blood loss, the most common cause of death from shark bite, according to research by Flinders University.

When a shark killed surfer Mercury Psillakis off a northern Sydney beach in September, his grief-stricken family called it "a tragic and unavoidable accident". More than 1,280 shark incidents have been recorded around Australia since 1791 -- about 260 of them fatal -- according to a national database.