The Great Sandy Strait is a significant tidal estuary and marine waterway stretching approximately 70 kilometers along the Fraser Coast of Queensland, Australia. This extensive system separates the mainland from K'gari (Fraser Island) and encompasses a vast area of 613 square kilometers, transitioning north into Hervey Bay. It is characterized by a complex network of intertidal sand and mud flats, expansive seagrass meadows, mangrove forests, salt marshes, and numerous low-lying sandy islands. The southern entrance near Inskip Point is about 2 kilometers wide, with the Mary River entering the strait at River Heads. The region is ecologically rich, designated as a UNESCO Biosphere Reserve and containing a Ramsar-listed wetland, all within the broader management framework of the Great Sandy Marine Park. The strait supports a diverse mix of tropical and temperate marine species, making it a premier destination for recreational angling.