The Invasive Species Centre is urging Canadians to think carefully before gifting pets this holiday season, warning that even well-intentioned choices can have serious consequences for Ontario’s natural ecosystems.
Aquarium fish, invertebrates, reptiles, amphibians, aquatic plants, and small mammals can all become invasive when released into the wild — a situation that often occurs when new owners are unprepared for the long-term responsibility of care.
Executive Director Colin Cassin says many people mistakenly believe releasing an unwanted pet into nature is a humane solution, but the impacts can be severe. Once introduced, non-native species may outcompete local wildlife, including species at risk, and create costly challenges for communities that must respond to infestations. “There is a misconception that releasing unwanted pets into the wild is a humane or viable solution,” Cassin says. “Unfortunately, this is not the case.”
Red-eared sliders and goldfish are among the most common species found in Ontario waterways after being released. Both can adapt quickly, reproduce in large numbers, and disrupt food chains by outcompeting or preying on native species. Even when released with good intentions, many pets struggle to survive, and the act itself is illegal under the federal Aquatic Invasive Species Regulations.
To prevent these situations, the Centre encourages people to plan ahead by choosing reputable retailers, understanding the long-term commitment of pet ownership, and seeking alternatives such as local rescues or rehoming programs if they can no longer care for an animal.
Ontarians can report sightings of invasive species through EDDMapS, iNaturalist, or the Invading Species Hotline at 1-800-563-7711.
(Written by: Joseph Goden)
