Goldfish produce adhesive eggs that attach themselves to aquatic vegetation. Typically this vegetation will be a dense plant such as a Cabomba or Elodea. The eggs will hatch within 48 to 72 hours. The New World Encyclopedia describes the fry released from the egg as being "large enough to be described as appearing like an eyelash with two eyeballs." Within about a week, the fry will begin to look more like a goldfish in shape. However it can take as long as a year until they develop a mature goldfish color.
The goldfish is a freshwater fish that belongs to the Cyprinidae family of order Cypriniformes. It was one of the first types of fish to be domesticated and continues to be one of the most commonly kept aquarium fish. Goldfish are a domesticated version of a less-colorful carp, which is native to East Asia. The goldfish was first domesticated in China over a thousand years ago. Goldfish breeds vary greatly in size, body shape, fin configuration, pattern and color. There are a number of combinations of white, yellow, orange, red, brown, and black that goldfish are known to have.