The Morrison government will accelerate a review of the endangered status of the Murray cod and silver perch, two species hammered by the series of mass fish kills on the lower Darling River in the past two months.

The silver perch was already listed as "critically endangered" while the cod - a favourite among anglers for its size of up to a metre in length - is considered "vulnerable".

Murray cod collected from the Menindee Weir Pool in far west NSW during one of three mass fish kills in the past two months. Credit:Rob Gregory

"I have requested the [Threatened Species Scientific] Committee expedite the assessment of the silver perch and provide consistency in the listing of the species across all range states," Melissa Price, the Environment Minister, said.

"Similarly, I have asked the committee to consider whether there is sufficient new information to

support prioritising the Murray cod for reassessment."