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The comet goldfish can be distinguished from the common goldfish by its long, single and deeply forked tail fin. Comets with yellow, orange, red, red-and-white color are common. Due to the comet's hardy and active nature, and the relative ease in caring for them, they are best suited to ponds and outdoor pools. Comet-tails can grow up to 12 inches in length.Sarasa Comets have long flowing fins and are very hardy fish. They can be kept with koi in an outdoor pond.These comet goldfish have a natural life of approximately 7 to 14 years and there are chances to live much longer in excellent conditions.
Goldfish are commonly bred on fish farms in many parts of the world such as the Far East, Middle East, Europe and the United States. In most instances, the millions of fish produced each year end up in pet or aquarium centers for sale to aquarists. However, in North America, there is a demand for goldfish used as bait or "feeder fish" to other fish by anglers.
Due to the relatively inexpensive prices of comets and the common goldfish, they also become toy prizes in carnivals or other places of entertainment. This practice was intended to be made illegal through a bill such as the Animal Welfare Bill (July 14, 2004) in the United Kingdom, but was unsuccessful.