The AUV Sirius was surveying sites east of Broughton Island on the NSW coast near Port Stephens as part of repeat IMOS AUV surveys. This area of the coast is well known as a Great White Shark nursery. This video shows a snippet of video taken from a forward looking camera on the vehicle which captured a juvenile shark having a look at the vehicle.
Andy and Stefan are in Port Stephens just north of Newcastle completing a survey just outside the mouth of Nelsons bay form Boulder Bay to Broughton Island.
Sea urchins create urchin barren by grazing an area of all plant life. The urchins are then thought to recede due to a combination of lack of food and being eaten by predators such as grouper and snapper. It is hypothesised that if the number of the urchin predators in an area are reduced then the effects of the urchins are amplified allowing them to become destructive to the marine environment.