Aquarium Fish

Ryukin Goldfish

posted: 05/15/12
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Ryukin Goldfish
Courtesy of Drs. Foster and Smith
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The Ryukin Goldfish has a curved backbone, a fat belly, and long feathery fins. It has a small, pointed mouth and the body is typically triangular in shape. There is a distinct hump on the back immediately behind the head. The Ryukin Goldfish comes in a variety of colors, including the Red/White, Calico, Red/Black, and Red Ryukin.

All goldfish are members of the carp group and are generally quite hardy. The Ryukin Goldfish will do well in a tank of 30 gallons of water or more with a fine gravel bottom and hardy, cold water plants. Goldfish are diggers and will scatter the fine sand onto leaves, injuring thin and less hardy plants. Roots and well-rounded river rocks are a good addition to the aquarium.

There appears to be a definite courtship ritual when Goldfish breed. Breeding often results in up to 1,000 eggs, with fry hatching in 5-6 days. The fry should be fed small pieces of live or prepared foods designed for egg-laying fish.

Goldfish are omnivorous and will eat all types of dried and live foods. Limit protein, however, to 30 percent of the diet. A Goldfish flake or pellet food will provide these fish with the proper nutrition.

Ideal tank mates include: Goldfish, Plecos, and some Scavenger Catfish.

Fish Facts

Name: Ryukin Goldfish (Carassius auratus)

Family: Cyprinidae

Range: China, Japan, Ryukin islands

Size: Up to 8 inches

Diet: Omnivore

Tank Set-up: Freshwater: Rocks, plants

Tank Conditions: 65-75°F; pH 6.5-7.5; dH 4-20

Minimum Tank Capacity: 30 gallons

Light: High

Temperament: Peaceful

Swimming Level: Middle

Care Level: Easy

Reproduction: Egg Scatterer

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