Picture: Al McGlashan. Catching Murray cod out west, where anglers have been at the forefront of cod conservation. Fishing of Murray cod has been restricted in South Australian waters since 2008, with the fishery closed to all activity in 2009 and opened for a limited catch and release season each year since 2011. I had one in my fish tank for a decade and believe me he didn’t like sharing. The Murray cod (Maccullochella peelii) is a large Australian predatory freshwater fish of the genus Maccullochella in the family Percichthyidae.