Luc Besson was initially unsure of who to cast in the main role of Jacques Mayol.
Enzo and Jacques have known each other for a long time. Their friendship started in their childhood days in the mediterranean. They were not real friends in these days, but there was something they both loved and used to do the whole day long: diving.
God is at the bottom of the sea and I dive to find him.
He initially offered the role to Christopher Lambert and Mickey Rourke and even considered himself for the role until someone suggested Jean-Marc Barr.
After that incident Enzo and Jacques lost contact. After several years, Enzo and Jacques had grown up, Johanna, a young clerk in a security office, has to go to Peru. There she meets Jacques who works for a group of scientist.