Efforts to Control
There are many different things that are considered or being done to stop the goldfish from overpopulating too much, for example, electric-shocking boats, killing them with chemicals, netting the fish, electrocuting the fish, and even draining the ponds and lakes that goldfish are in. These might not be the best ways to get rid of them though, as they reproduce quickly and can adapt to many conditions.
Impacts to the Environment
There are many impacts that the invasive Goldfish have on our environment. Most of them are negative. First the Goldfish is not native to Canada. Sure, many people have Goldfish as pets in Canada but in the wild, they are not a native species. Also the Goldfish can disrupt the aquatic environment. They do this by draining the other fish's resources and taking up all the space in the pond/lake. Lastly they breed lots. this can overpopulate lakes and pods and take other fish's homes. If you don't believe me goldfish experts and pet store employees say that if you are keeping more than one goldfish, to get a big tank because they reproduce quickly.