The event is part of the Ladies European Tour.
Joining the Indian duo in the cage dive out of Rocky Bay, Pennington were Australian Lindsey Wright and England's Felicity Johnson. They were surrounded by blacktip sharks while a pair of humpback sharks swam only 50 metres from their boat.
"It was absolutely amazing; a once in a life time opportunity," Smriti said.
South Africa's oldest women's professional golf tournament has reclaimed its place on the Ladies European Tour calendar, and will feature the country's leading professionals competing against a strong international field for a total purse of 260 000 pounds.