Ontario's feral goldfish population is exploding and climate change may be to blame

Ontario's feral goldfish population is exploding and climate change may be to blame

Source: CBC News

5/2/2022

Credit: Cole Burston/University of Toronto Scarborough

For years, Andrew Murray would see the small schools of goldfish living in the storm pond near his home in suburban London, Ont. He never thought much of them until this spring, on a sunny day in April when the normally greenish pond had an unusual, if not slightly orange tinge.

An avid nature photographer, he captured a few close-ups. It wasn't until he got home and looked at the pictures that he realized how many goldfish must be swimming around in there.

"When I looked at them on my computer later, it was clear there were just thousands and thousands of fish in there."

Researchers at the University of Toronto believe this scenario is repeating itself hundreds of times in suburban storm ponds all over the province. Originally built to reduce neighbourhood flooding and relieve pressure on Ontario's city sewer systems, these pools have become ground zero for what Nicholas Mandrak calls "super invaders."

Goldfish

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