Doing a story based on a real event means that you should treat it with as much of a sense of reality as you can. To the makers of The Reef that meant using real sharks in the film. If you really want to know what it feels like to be stalked by a real shark, you¹ve got to use a real shark!
The Reef team used Calypso Star Charters to get amongst the sharks. Here is some shark footage that was shot during the making of The Reef. In the first clip our camera ended up in the mouth of a 14ft white pointer, what was so amazing is that no one saw it coming.