Most Australians know how to choose a wine, cheese or coffee that suits their palate. But when it comes to oysters, many of us don't know what to look for for beyond its species: Sydney Rock or Pacific? If you want to choose the best oyster, there’s more to it than that, as viewers learn in Rick Stein's Australia. To pick a great oyster, it’s important to know where it comes from, when it was harvested and how you plan to eat it. Here are five questions you can ask to help you pick the best oyster.