According to Insider, the common goldfish has become an invasive species overtaking a lake in Minnesota. Why? Well, people have been releasing their pet goldfish into the lake without realizing how massive these fish can grow if they are in a large enough environment, and how much havoc it can wreak on the ecosystem. Massive goldfish have become an invasive species in a lake in Minnesota where people have released their pet fish, officials say. “Please don’t release your pet goldfish into ponds and lakes,” a message the city’s of Burnsville, Minnesota’s official Facebook page said. The message warned that the goldfish “can contribute to poor water quality by mucking up the bottom sediments and uprooting plants.” Along with the message were some photos of some strikingly large goldfish. Typically, they’re small fish, approximately 4 inches in length. But the ones experts are finding in the lake are like ten times that size. Insider
