Sydney (AFP) Oct 27, 2025 An Australian freshwater Murray cod has surprised scientists by swimming a marathon 860 kilometres (530 miles) along a major river system - believed to be a record for the species. The fish, named Arnie after Australia's recently retired Olympic champion Ariarne Titmus, was first tagged in early 2022 in Mullaroo Creek, about 13 hours' drive west of Sydney, said Arthur Rylah Institute resear
