In Alberta, schools of invasive goldfish, some as large as dinner plates, have become a concerning issue. The provincial government is raising awareness about the significant threat that native ecosystems are under due to the presence of goldfish in various water bodies throughout Alberta.
Provincial Environment Minister Grant Hunter emphasized the importance of keeping goldfish in aquariums and not releasing them into Alberta’s waters. More than 100 locations in Alberta have reported the presence of goldfish, with new locations being added each year, according to the province’s aquatic invasive species specialist, Nicole Kimmel.
Contrary to popular belief that goldfish end up in waterways through accidental means, Kimmel clarified that people are deliberately dumping them into water bodies, where they manage to survive, reproduce, and proliferate. The “Don’t Let It Loose” campaign by the province aims to deter the illegal release of species into waterways by imposing fines and potential imprisonment for offenders.
Goldfish pose a substantial risk to native aquatic ecosystems due to their adaptability and prolific breeding habits. They can consume various food sources, reproduce rapidly, and withstand harsh winter conditions in Alberta. Each goldfish has the potential to produce thousands of offspring within a short period, giving them a competitive edge over native fish species.
The invasive goldfish issue extends beyond Alberta, with University of Toronto biology professor Nicholas Mandrak describing them as “global invaders.” Mandrak highlighted storm-water management ponds as ideal breeding grounds for goldfish, as they provide a conducive environment for rapid growth and reproduction.
Efforts are underway to control the spread of goldfish from storm-water ponds into the wild, but once established, there is no specific method to eradicate them. The Alberta government is closely monitoring goldfish populations across the province to prevent further proliferation. Reporting sightings of goldfish and other invasive fish to the Aquatic Invasive Species Hotline is encouraged, along with reporting any intentional releases to the Report A Poacher hotline.
Addressing the issue of invasive goldfish requires collective action to prevent widespread ecological damage and protect native species in Alberta and beyond.
