A 30-centimetre, 2.4-pound goldfish, roughly the size of a dinner plate, was removed from the Drake Landing stormwater pond in Okotoks (Photo credit: GoA)
Goldfish and other invasive fish are among Alberta’s most disruptive aquatic invasive species, posing significant risks to native ecosystems when left unchecked. They are highly adaptable, outcompeting other fish for food, destroying aquatic plants and degrading water quality as their populations rapidly increase.
Prevention remains the most effective approach, as there are no effective selective control methods available and any removal efforts would impact all fish species in a waterbody. Through its “Don’t Let It Loose” campaign, Alberta’s government is reminding the public never to release aquarium pets, water garden plants, live food, sportfish or live bait into Alberta’s rivers, streams, lakes, ponds or storm drains.
“Goldfish belong in aquariums, not in Alberta’s waters. Don’t let it loose. Report sightings of invasive fish and help protect Alberta’s ecosystems by following the law.”
Albertans are also asked to report sightings of goldfish and other invasive fish to the Aquatic Invasive Species Hotline at 1-855-336-BOAT (2628) and, where possible, provide a clear photo showing the fish’s entire body and fins for staff follow up.
It is also illegal in Alberta to move live fish from one water body to another. Penalties for illegally transferring fish can be up to $100,000 and/or one year in prison. If you witness the suspected intentional release of an aquatic invasive species in Alberta, please call the 24/7 Report A Poacher hotline toll-free at 1-800-642-3800.
Quick facts
- Invasive fish can thrive in harsh, changing environments, giving them an advantage over native species and threatening Alberta’s aquatic ecosystems.
- A single released goldfish can produce an estimated 40,000 offspring within three years, reproducing up to three times annually.
- Invasive fish are opportunistic feeders, consuming almost anything organic, including small fish, aquatic insects and vegetation.
- Invasive fish carry diseases and parasites that can be introduced into the environment, including from fish that have been inappropriately disposed of – dead or alive.