These animals now enjoy full protection in South Africa, which is consequently one of the best places in the world to view them.

There are several places where visitors can go cage-diving with sharks, the most popular being Gansbaai, about 160km east of Cape Town.

Here, your clients can board a boat and head out to a spot known as Shark Alley, where chum is used to attract the sharks. Once a shark puts in an appearance, it’s time to hop into the cage dangling off the side of the boat for a closer look under water.

Your clients won’t need any special diving experience as snorkels are used. However, if they are susceptible to seasickness, advise them to take a remedy ahead of the trip, as the boat stays anchored for several hours in one spot during this outing, which can exacerbate the problem.

The months of May through to October are the best time to go cage-diving as the sharks tend to disperse in summer.