These ponds generally are less than one-eighth of an acre in size and may freeze solid ... Many people, during their youth, went to the five and dime store and paid ten cents for a common goldfish.

Goldfish (Carassius auratus) and koi (Cyprinus rubrofuscus) are common ornamental fish that can pose significant harm to aquatic ecosystems ... Over 100 locations of goldfish are known in Alberta, ...