The government of Alberta is issuing an important reminder to owners of pet goldfish in the province: Don't let it loose.

That little goldfish may seem harmless when swimming around a glass bowl, but new research suggests it can become a hazard for lakes and ponds. A study published in the Journal of Animal Ecology last ...

Released pet goldfish are growing to the size of a football and wreaking havoc on ecosystems in Minnesota and elsewhere. Reading time 3 minutes It’s a common story: A family gets a goldfish, but then ...

If you think your pet goldfish will have a better life in a local pond, Alberta officials have one message: don't let it ...

Zookeepers have proposed a real “grizzly” solution to controlling giant invasive goldfish. For years, pet goldfish released into US waterways have been wreaking havoc by ballooning to gargantuan sizes ...

Giant goldfish are routinely found in Alberta waters.

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Photos showing enormous goldfish caught in a harbor in Canada have been ...

Invasive species are one of the leading causes of global biodiversity loss, and the pet trade is responsible for a third of all aquatic invasive species. Pet owners releasing unwanted pets into the ...

Goldfish can grow to large sizes, reproduce quickly, decrease water quality and gobble up the resources native species need to survive when released into a body of water bigger than a fishbowl. Kelli ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Looking after a pet can teach your child about compassion, ...

Although the goldfish has since died, Judi Dench recalled how her pet ended up growing to be "about six inches long" after she saved it Maria Pasquini is a Senior News Editor for PEOPLE, covering ...