Map of South Australian coastline and 10 survey sites – Shelly Bay, Ceduna; Black Springs, Coffin Bay; Main Beach, Port Lincoln; Point Lowly, Whyalla; Semaphore Beach, Adelaide; Hallett Cove Beach, Adelaide; Blowhole Beach, Deep Creek; Encounter Bay, Victor Harbor; Karrata Beach, Robe; and, Brown's Beach, Kangaroo Island. (Courtesy Claire Moore)