Chelodina (Chelydera) expansa, commonly known as the broad-shelled river turtle, broad-shelled snake-necked turtle, or giant snake-necked turtle, is a pleurodiran freshwater turtle and is the largest of the long-necked turtles. It is widely sympatric with the Murray River turtle and eastern snake-necked turtle. C. expansa is listed as 'vulnerable' in South Australia and 'threatened' in Victoria.