Common carp can also interbreed with the goldfish ("Carassius auratus"); the result is called . Invasion of gold fish ("Carassius auratus") has adversely affected the indigenous fauna. Note&colon; The above-mentioned "crucian carp" generally refers to "Carassius auratus", unless otherwise noted. The goldfish ("Carassius auratus") is a freshwater fish in the family Cyprinidae of order Cypriniformes. Non-native fishes include goldfish ("Carassius auratus auratus") and Western mosquitofish ("Gambusia affinis"). Goldfish ("Carassius auratus") and Prussian carp ("Carassius gibelio") are now considered different species.