Calgary stormwater pond infested with invasive Prussian carp

A stormwater pond in Calgary's Evanston community is filled with invasive Prussian carp, which spread through drainage routes.

Prussian carp can produce all-female, clone-like offspring without a mate, enabling rapid population growth from a single fish.

The species threatens Calgary's stormwater infrastructure, designed to manage rainwater and protect the Bow River, and may require costly fixes.

Alberta was the first place in North America to detect Prussian carp, which have since spread to the Bow, South Saskatchewan, and other river systems.

The City of Calgary is implementing a city-wide action plan to address the invasion, which is linked to illegal dumping of pet fish.