The idea of returning Murray crayfish to the river in South Australia is not new. Two University of Adelaide ecologists, the late Keith Walker and Mike Geddes, first suggested it in the 1990s.

The invasive Australian redclaw crayfish has been spotted in southern Texas, roughly 8,000 miles from its home. The freshwater crustacean is indigenous to the rivers of northern Australia and ...

Giant freshwater crayfish, longer and bulkier than today’s species, roamed New Zealand 20 million years ago. They would have ...