The Fish Lab at Macquarie University has been studying Port Jackson sharks for over a decade. Our initial studies just tried to figure out where they go and what they do: basic behavioural ecology.  But it soon became apparent that they are in fact a great model system to ask all sorts of questions about benthic shark behaviour, ecology, cognition and physiology. Here i'll provide an overview of this work ranging from movement and migration, social behaviour, their cognitive abilities to how they will respond to climate change.  Join me in this sneak peek into the private lives of PJs.