“Please don’t release your pet goldfish into ponds and lakes!,” the City of Burnsville implored in a tweet. “They grow bigger than you think and contribute to poor water quality by mucking up the ...

Goldfish, as voracious eaters, will devour snails, small insects, fish eggs, and young fish, out-competing native fish. They can also grow over a foot long outside in the wild. (Pictured: A 14-inch ...