The comet goldfish is the only breed of goldfish that was developed in America. First bred and introduced into the commercial aquarium market in the late 1800s, the comet gets its name due to its long, flowing tail fins that give it the appearance of a comet burning a trail through the sky.
The comet goldfish is very similar to the common goldfish, and the two are often confused. The difference is that the comet goldfish has a longer body and longer, flowing fins.
Comet goldfish are usually reddish-orange in color but also come in red, orange, yellow, white and bi-color varieties like the Sarasa Comet, which is a red and white bi-color variety.