The Great Darling Anabranch is an ancient, intermittent watercourse and anabranch of the Darling River, flowing through the arid Riverina region of New South Wales. This system is a vital ecological corridor within the Murray-Darling Basin, characterized by its reliance on connectivity flows from the northern basin and the Menindee Lakes system. Water reaches the anabranch from the lakes via Tandou Creek and several other minor creeks, creating a dynamic environment that supports significant native fish populations. Its flow regime is managed, with connectivity flows essential for fish movement and spawning, making it a unique and important fishery focused on native Australian species.