Disrupted by the nocturnal light pollution of the increasingly numerous divers of the Tetamanu pass in which they operate in large schools, the gray sharks (Carcharhinus amblyrhynchos) become more and more aggressive and their bites multiply. While it is normal for sharks to be more aggressive when they hunt, divers are recommended to get into the water before 8:00 p.m., the activity and therefore excitement peak of the predators.