A stormwater pond in Calgary appears filled with Prussian carp; the invasive fish can produce...

A stormwater pond in Calgary appears filled with Prussian carp A stormwater pond in Calgary appears filled with Prussian carp; the invasive fish can produce all-female clone-like offspring and spread through drainage routes.Residents living in the northwest Calgary community of Evanston noticed that a local stormwater pond seems packed with Prussian carp, sparking serious concern over the spread of the invasive species through city drainage systems. According to Rural Roots Canada, the discovery shows how easily unwanted aquarium pets can take root in local waterways.While nobody knows exactly how the fish first got into Alberta, experts think the problem started with a goldfish release. This happens when people illegally dump unwanted pet fish into storm ponds, local channels, or rivers.Alberta was the first place in North America to spot Prussian carp. Since they first showed up, the fish have travelled through connected rivers into Saskatchewan and appeared in several Alberta river systems. According to Rural Roots Canada, affected areas include the Bow, South Saskatchewan, North Saskatchewan, Oldman, Red Deer, and Rosebud rivers.Why Prussian carp threaten local watersPrussian c...