|Grey Nurse sharks follow their live food supply - then 'vanish' to unknown destinations of their choice. This is often mistaken as their population declining.|
Ben Cropp AM reports on the situation in (circa) 2007 when it was believed the population was in peril. Dive sites visited and known for GNS are Wolf Rock, Flat Rock, Big Seal Rock and 'Magic Point'. The since outdated tagging system of drilling holes through both dorsal fins to attach plastic livestock-style ear tags is shown. The best material is the final ten minutes. There is an interview with a former professional fisherman (Bernie) at Seal Rocks beach who explains how 300 divers in any one day of a weekend had to have been spooking sharks during the late 1980s. In retrospect (2016) it's no wonder the Grey Nurse were vanishing - they were going elsewhere to avoid scuba divers. Plus the set lines catching them, also at Seal Rocks by another pro fisherman.