Murray-Darling fish kill: extreme weather and low river flow led to drop in oxygen levels

NSW report says a temperature plunge from 46C to 28C contributed to the 'unprecedented' death of 'hundreds of thousands of fish'

Little or no flow in the Darling River and a plunge from high temperatures are likely to have led to conditions that caused a catastrophic drop in oxygen levels prior to extensive fish kills at Menindee.

An interim investigation by the New South Wales Department of Primary Industries found the fish deaths were likely to have been caused by "several related and compounding factors resulting in low oxygen in the river".