List of lagoon in Australia (found 7 locations). Category description: A shallow coastal waterbody, completely or partly separated from a larger body of water by a barrier island, coral reef or other depositional featureOil Tree Lagoon (New South Wales) Old Harbour Lagoon (New South Wales) Omanile Lagoon (Northern Territory) Oolarinna Salt Lagoons (South Australia) Oorong Oorong Lagoon (New South Wales) O’Neill Lagoon (New South Wales) O’Neills Lagoon (New South Wales)