Here’s an example where consumer education is needed.
Goldfish finding their way into bodies of freshwater, accidentally or on purpose, is no new phenomenon. These fish are not native to North America but come from eastern Asia and have no natural predators here to curb their growth.
Goldfish and lots of other things should never be flushed into the sewer systems.
Source: Atlas Obscura, June 24, 2019. Link.
Also see: Football-sized goldfish caught in Minnesota lake, Smithsonian, July 14, 2021. Link.