This is what can happen when you release your goldfish into the wild A city in Minnesota tweeted out some pretty shocking photos Friday morning, of massive, overgrown goldfish found in a lake. Credit: City of Burnsville Author: 10TV Web Staff, Alexandra Simon Published: 10:56 PM EDT July 12, 2021 Updated: 10:56 PM EDT July 12, 2021 BURNSVILLE, Minn. — You'll want to think twice before dumping that county fair goldfish you won into a nearby stream or pond. A city in Minnesota tweeted out some pretty shocking photos Friday morning, of massive, overgrown goldfish found in a lake. "Please don't release your pet goldfish into ponds and lakes! They grow bigger than you think and contribute to poor water quality by mucking up the bottom sediments and uprooting plants," read the post.