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

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.