The world’s largest migration of fish, South Africa’s annual Sardine Run features billions of sardines and all the accompanying marine predators, from dolphins and whales to sharks and sailfish, as well as dozens of marine bird species. Shark specialist and scuba diving guide Walter Bernardis from African Watersports talks about the Oceans Without Borders Marine Migration Expedition, which allows guests to experience the magnificent spectacle as the sardines form into tight shoals known as bait balls, prompting thrilling feeding frenzies. A highlight that deserves to be on any diver’s bucket list, find out what it’s like to experience this underwater migration.