The Maroochy River is a significant estuarine system located on Queensland's Sunshine Coast, flowing through the coastal landscape north of Maroochydore. It is a declared Fish Habitat Area, encompassing 790 hectares of vital estuarine environment that includes sections of the main river as well as Eudlo Creek, Petrie Creek, and Coolum Creek. This designation highlights its importance as a nursery and adult habitat for a wide variety of fish and crustacean species, making it a premier destination for recreational anglers targeting both freshwater and saltwater species in a relatively undisturbed setting.