Unwanted pet goldfish dumped in Minnesota waterways grow to gigantic size. It’s unbelievable

On Monday, 18 additional fish were found in Burnsville. Some were 18 inches (46 centimeters) long and weighed about 4 pounds (1.8 kilograms).

Officials in Minnesota said they’re finding more giant goldfish in waterways, prompting a plea to citizens to stop illegally dumping their unwanted fish into ponds and lakes. The goldfish, which can grow to the size of a football, compete with native species for food and increase algae in lakes. Officials in the Twin Cities suburb of Burnsville found 10 fish in Keller Lake earlier this month while doing a water quality survey.