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.