Underwater model Irina Britanova, 27, mingled with tawny nurse sharks in the Maldives. /CFP Photo

Britanova, who regularly poses for aquatic shoots, managed to hold her breath at a depth of about 17 meters so the images could be captured. In some frames, she gets close enough to sharks to hold on to their fins and be swept along for a ride. /CFP Photo

According to the International Shark Attack File, there were 81 unprovoked shark attacks on humans worldwide in 2016, with four of them fatal. /CFP Photo