The goldfish (Carassius auratus) is a freshwater fish in the family Cyprinidae of order Cypriniformes. IThe goldfish (Carassius auratus) is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is commonly kept as a pet in indoor aquariums and is one of the most popular aquarium fish.
The optimum temperature for fancy goldfish is 68° to 74° F, pH is not critical, but ideally should be between 7.0 and 8.4.
As well as flakes and pellets designed specifically for them, goldfish will eat peas (with the shells removed), boiled vegetables, bloodworms, and brine shrimp. The above foods make a great change to flakes and pellets
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