Officials identified the victim as New Zealander Adam Strange. He died after being attacked while swimming off Muriwai Beach, a popular swimming spot west of Auckland.
According to Strange's website, one of his films - Aphrodite's Farm - won the Crystal Bear award for Best Short Film at the festival in February 2009. Strange co-wrote and directed the 15-minute movie.
Police called by onlookers to save Strange shot a shark as it attacked his lifeless body. The shark, thought to be a great white, rolled away, believed to be dead.
Strange's body was recovered. He was married with one young child.