Around 3000 goldfish were removed from a dam on Wilyabrup Brook in Western Australia, according to a report by the local Augusta Margaret River Mail.
The feral goldfish were caught using an electro-fishing method which stunned the fish so that they floated to the surface and could be removed.
Rivercare officer Drew McKenzie said that he was shocked at the number of goldfish found in the dam. He told the Augusta Margaret River Mail: "We did not find a single frog or tadpole in the dam which demonstrates the amount of damage feral fish like goldfish can cause."
The catch prompted calls from the Cape to Cape Catchments Group (CCG) for people not to release unwanted pet goldfish into the wild.
The goldfish were taken to Murdock University where they will be examined for parasites.