Goldfish
The goldfish ("Carassius auratus") is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is one of the most commonly kept aquarium fish.
Common goldfish
Common goldfish are often used as live prey for freshwater turtles, notably red-ear sliders and other carnivorous fish, such as the oscar. When fed exclusively, feeder goldfish are not a good source of nutrients.