The 677-hectare (1,670-acre) coastal site lies in the City of Rockingham, about 50 kilometres (31 mi) south of the state capital, Perth, and is largely surrounded on the landward side by residential suburbs.

[2] The sedgelands of the site are listed as a threatened ecological community under the Commonwealth Environment Protection and Biodiversity Conservation Act 1999.

The wetlands are arranged in about ten groups roughly parallel to the coast, and separated by sand ridges.

They form one of the youngest wetland systems on the Swan Coastal Plain and show a continuum of development in hydrology, geomorphology and vegetation unique in Western Australia.

[3] Native fauna found at the site include the quenda, southern carpet python and black-striped burrowing snake.