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Type of Japanese goldfish

Shubunkins (朱文金) are a hardy, single tailed goldfish with nacreous scales and a pattern known as calico. The Shubunkins are of Japanese origin. The Shubunkin was created by Yoshigoro Akiyama (:ja:秋山吉五郎) by crossing Calico telescope eye with a Comet goldfish and a Common goldfish.

Shubunkins are similar to the common goldfish and comet goldfish in appearance. They were first bred in Japan, from crossbreeding the calico telescope eye goldfish (Demekins), comet goldfish, and the common goldfish c. 1900. They have streamlined bodies with well developed and even fins. However, the Shubunkins are calico goldfish; they possess nacreous scales (an intermediate between metallic and transparent scales that are pearly in appearance). The overlapping patches of red, white, blue, grey and black (along with dark speckles) normally extend to the finnage of Shubunkins. Blue is the most prized colour in Shubunkins. Calico originally denoted three coloured varieties of goldfish that did not include blue. The best blues are produced from line breeding of good blue specimens of Shubunkins. Sometimes good blues may be obtained by breeding bronze (metallic) with "pink" (matte scaled) goldfish, but a grey slate colour may result instead. It may take several months for the nacreous coloration to develop on a young fry (baby fish). Shubunkins are excellent pond fish because they reach a length of at adulthood. A Shubunkin goldfish is considered an adult at 1 to 2 years of age,

Blue colouring in goldfish comes from black pigment within the body wall. have a slimmer body shape than the London Shubunkin, with deeply forked, pointed tail fins, and longer finnage all around. They are the most frequently seen type of shubunkins and the most common kind of shubunkins in many fish stores and markets. Bristol Shubunkins are a long broad bodied goldfish with well developed finnage, possessing a tail that is exaggeratingly large, moderately forked, and rounded at the end, making a shape similar to that of a heart or the capitalization of the letter "B". They are the rarest shubunkins, hardly in stores, and few are in the US. The name Bristol shubunkin comes from the city in Britain where they were originally bred.