Earlier this year we did a cruise from Sydney to Tasmania return with two port stops. So a totally Australian cruise
At the first stop, Burnie, which is a working port with no cruise terminal, there were biosecurity officers onboard the ship checking all bags before passengers were allowed to leave the ship.
At Hobart, which does have a cruise terminal, the bag checks were conducted as you entered the terminal.
Australia and New Zealand take biosecurity very seriously to avoid imported pests making new homes there. In fact in Australia there are even biosecurity checks between some states.