
AI-generated image
Carassius auratus
A line selected out of the Niigata-bred tamasaba and shaped into a body as round as two bowls set together. It is regarded as closer to a brand than to a distinct variety.
The fukudaruma is a line selected out of the tamasaba of the Chuetsu region of Niigata Prefecture and shaped into a body as round as two bowls set together. It began with the breeder Mr Miyajima setting out to make a fish of that shape. Properly it is normal-scaled and long-tailed, though transparent-scaled and short-tailed fish are common in circulation now. Japanese Wikipedia describes it as closer to a brand than a distinct variety, with no decisive difference from the tamasaba, occupying a position comparable to the Uno line among ranchu. The underlying tamasaba arose in Niigata, known for its koi, where the ryukin is difficult to overwinter: crossing the ryukin with the shonai goldfish gave it cold tolerance. Despite the round body it swims as briskly as a wakin, and it is hardy in cold.
Source: Wikipedia (CC BY-SA 4.0)
The Fukudaruma lives 10-15 years.
The ideal temperature for the Fukudaruma is 15〜28℃.
Origin
Niigata Prefecture, Japan
Lifespan
10-15 years
Temperature
15〜28℃
Prepared foods, frozen bloodworms
Sources: FishBase (Carassius auratus) / Keihan Nishikigoi Center: goldfish water management / Kingyo Hitosuji: Ryukin / Kingyo Hitosuji: Wakin
Goldfish varieties are established by fixing mutations and by selective breeding, and traits of body form, tail form, scale type, colour and head growth are all carried forward as line-bred selections. No primary source identifying loci or dominance for individual traits could be found, so inheritance is recorded only as line-bred.
Sources: Kingyo Hitosuji: 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
The round body and the sweep of the tail read well from above or from the side. Ponds are viewed from above and tanks from the side; neither needs special lighting.
Hardy in cold, it is often kept in the same ponds as koi. Despite the round body it swims briskly, so provide room to move.
It swims fast, so pair it with other tamasaba-line or wakin-type fish. Slow breeds such as telescopes and bubble eyes will lose out at feeding time.
Tamasaba parents can throw long-bodied fish by reversion, so body form varies. Bear in mind that normal scales and a long tail are considered the proper form when choosing.
Beginner. This is a beginner-friendly species. No special equipment or experience is required, and it can be kept successfully with basic care setup.
The ideal temperature for Fukudaruma is 15〜28℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Fukudaruma is 10-15 years. With proper care and nutrition, they can live a long and healthy life.
Fukudaruma feeds on: Prepared foods, frozen bloodworms. Aim for a balanced diet with appropriate feeding frequency.
The price of Fukudaruma varies significantly depending on variety, size, and individual quality. Check our market price page for the latest pricing information.
Last updated: September 17, 2026