A nationally endangered fish has been rediscovered in South Australia's Riverland region for the first time in five years.
The Murray Hardyhead is a small freshwater fish that was found in a wetland near Renmark, close to the Victorian border.
It has been listed as endangered since 1999.
Aquasave-Nature Glenelg Trust's Dr Nick Whiterod conducted the fish survey at the site.
He said it was an important discovery considering it was under considerable threat.
"There only are a limited number of known populations of these fish in the Riverland," Dr Whiterod said.
"Almost one thousand fish were sampled with both juveniles and adults observed, indicating recent recruitment and some persistence at the site."
The species was once widespread across the Lower Murray River and Lower Lakes areas.
It currently only survives in a handful of locations.
The new finding brings the total number of known Murray Hardyheads in the Riverland to four.
