The deaths of up to a million fish along the Darling River system in New South Wales is leading to calls for an overhaul of how Australia's resources are managed and allocated.

"How many fish are in here, how many fish have come ... many of those who live and work along the Darling River like Barkindji man and river ranger Fred Bennett were playing the waiting game.

The Menindee community is invited to an open day to tour the new state-of-the-art tube fishway on their doorstep, with the temporary fish passage ...