
AI-generated image
Carassius auratus
The name for ryukin whose body is exceptionally deep and short. The appeal lies in the way the rounded fish trots about on short fins, and most individuals carry a short tail.
Daruma ryukin is the name given to ryukin whose body is exceptionally deep and short. The ryukin was fixed in China from long-tailed fish that appeared as mutations of the wakin, and reached Satsuma by way of Ryukyu between the Anei and Tenmei eras of the Edo period. Its proper form is a short, deep, rounded body with long extended fins, but as breeding continued in China a short-tailed type appeared whose caudal does not lengthen, and that fish is handled as the short-tail ryukin. Daruma ryukin refers to the compressed body itself, and most such fish are short-tailed. The combination of a round body and small fins is not efficient for swimming, though the fish moves about a tank without difficulty. Overfeeding and the swim bladder trouble it causes need watching.
Source: Wikipedia (CC BY-SA 4.0)
The Daruma Ryukin lives 10-15 years.
The ideal temperature for the Daruma Ryukin is 15〜28℃.
Origin
Japan and China (the ryukin itself came from China in the Edo period)
Lifespan
10-15 years
Temperature
15〜28℃
Sources: FishBase (Carassius auratus) / Keihan Nishikigoi Center: goldfish water management / Kingyo Hitosuji: Ryukin / Kingyo Hitosuji: Short-tail Ryukin
Goldfish varieties arose from fixed mutations and selective breeding, and body form, tail form, scale type, colour and head growth are all carried forward by selection over generations. Inheritance is therefore shown as line-bred throughout rather than split into dominant and recessive.
Sources: Kingyo Hitosuji: Short-tail Ryukin
A curated selection of notable morphs. Inheritance modes are a breeding-planning guide; actual appearance varies with combos.
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Sources: CITES Appendices (species not listed) / FishBase (Carassius auratus)
Regulations may change. Always verify the latest information with the relevant authorities.
Find listings for this species
Prepared foods, frozen bloodworms
The breed is enjoyed from the side for its deep round body and extended fins, and needs no special lighting; enough to show the translucency of the fins is plenty.
A round body with small fins makes for inefficient swimming, so keep the flow modest. In a tank, use a thin layer of substrate and leave out obstacles that would impede movement.
Keeping long-tailed Japanese ryukin with short-tailed Chinese fish is not recommended. Pair it with round-bodied breeds of similar pace.
Overfeeding causes swim bladder trouble in many fish of this type. Keep portions small, and cut back further when temperatures fall so digestion is not overloaded.
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Daruma Ryukin is 15〜28℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Daruma Ryukin is 10-15 years. With proper care and nutrition, they can live a long and healthy life.
Daruma Ryukin feeds on: Prepared foods, frozen bloodworms. Aim for a balanced diet with appropriate feeding frequency.
The price of Daruma Ryukin varies significantly depending on variety, size, and individual quality. Check our market price page for the latest pricing information.
Last updated: September 17, 2026