*Mandatory Credit* PIC BY LAURENT BALLESTA / CATERS - (Pictured: Laurent Ballesta.) - This committed photographer spent a grand total of 3,000 DIVE HOURS trying to get the perfect shots, capuring beautiful images of a rare shark feeding frenzy. Laurent Ballestas images show the glimmering gray reef sharks hunting in swift packs, flying through the water and feasting on the the likes of helpless grouper. The challenge facing Laurent, 44, to get these images, in Fakarava Atoll, French Polynesia, cannot be underestimated: The grouper there spawn only once a year under a full moon, some time in June or July, and only for around 30 minutes. In total, the set of images required 21 weeks of diving, day and night, spanning over four years and 85,000 images. - SEE CATERS COPY *** Local Caption *** LAURENT BALLESTA , CATERS, animal.press