If your land based youll have to wait till after the prawn season when its real cold 2.5 to 3.5 inch pink & orange jigs (yozuri's are one of the best),If your in a boat try jigging over known weed beds,I believe the Southern end of Moreton Island is where they can be found,( I'm land based) Do a search through the forums theres plenty of info here on where to go .