Wilson Inlet is a shallow, seasonally open estuary nestled on the coast of Western Australia's Great Southern region, situated approximately 2 kilometres southeast of the town of Denmark. Covering roughly 12,050 acres with over 32 miles of shoreline, this productive estuarine system receives freshwater input from the Denmark River and Hay River, as well as smaller tributaries including the Sleeman River, Little River, and Cuppup Creek. The inlet is divided into two distinct basins — an eastern basin and a western basin — and features a wave-dominated mouth approximately 100 metres wide that is naturally barred from late January through August each year. This seasonal opening and closing cycle profoundly shapes the ecology and fishing dynamics of the inlet, making it one of the most unique and productive estuarine fisheries along Australia's south coast.