Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Cherax quinquecarinatus is a small freshwater crayfish endemic to the south-west corner of Australia. It is one of two species known as gilgie, or jilgi, which is a seasonal food source for people of the region. Gilgies are found throughout a biogeographically isolated region of the coastal south of Western Australia and significant in the ecology of aquatic systems of that bioregion.