In Alberta, schools of invasive goldfish, some as large as dinner plates, are causing problems for the ecosystem. The government is warning about the serious threats these goldfish pose to native habitats after they were introduced into various water bodies across the province.
Environment Minister Grant Hunter emphasized the need to keep goldfish in aquariums, not in Alberta waters, as their presence has been identified in over 100 locations in the province. According to aquatic invasive species specialist Nicole Kimmel, new locations are continuously being added to the list each year, indicating intentional dumping of goldfish into waterways where they thrive and reproduce.
Contrary to popular belief that goldfish are accidentally released into waterways, Kimmel clarified that people are intentionally disposing of them, leading to their successful establishment and propagation in Alberta’s waters. The “Don’t Let It Loose” campaign by the province aims to prevent the illegal release of species into water bodies, punishable by fines up to $100,000 and/or imprisonment.
Goldfish can pose significant risks to native aquatic ecosystems due to their adaptability and voracious appetite, unlike many native fish species. They are known to survive harsh winters and reproduce rapidly, with a single goldfish potentially producing up to 40,000 offspring in just three years, giving them a competitive advantage.
The issue of invasive goldfish extends beyond Alberta, as they are considered global invaders due to their ability to thrive in various environments. University of Toronto professor Nicholas Mandrak highlighted storm-water management ponds as ideal breeding grounds for goldfish, as they provide a conducive environment for their rapid growth and reproduction.
Efforts to control the spread of goldfish from storm-water management ponds into the wild are ongoing, with a focus on preventing their negative impacts on native species. Mandrak emphasized the need to address the illegal introduction of goldfish and its potential nationwide consequences, urging vigilance in reporting sightings of goldfish and other invasive fish to the authorities.
To report sightings or intentional releases of invasive fish, Albertans can contact the Aquatic Invasive Species Hotline at 1-855-336-BOAT (2628) and provide clear photos for identification. Suspected intentional releases can be reported to the 24/7 Report A Poacher hotline at 1-800-642-3800.
