![]() ![]() Only nacreous scales are accepted by the Shubunkin breed standards. The nacreous (formerly called calico ) scale type is produced in a fish that carries the gene for metallic scales, as well as the gene for matte scales (the fish is heterozygous). It will not show as blue in fish with metallic type scales, but will look blue if the fish has matte or nacreous scales. American Shubunkin Male Shubunkin Genetics īlue colouring in goldfish comes from black pigment within the body wall. With proper diet and water conditions, the average lifespan of a Shubunkin goldfish is around 10-15 years. A Shubunkin goldfish is considered an adult at 1 to 2 years of age, even though they live much longer. Shubunkins are excellent pond fish because they reach a length of 9 to 18 inches (23 to 46 cm) at adulthood. It may take several months for the nacreous coloration to develop on a young fry (baby fish). Sometimes good blues may be obtained by breeding bronze (metallic) with "pink" (matte-scaled) goldfish, but a grey slate colour may result instead. The best blues are produced from line breeding of good blue specimens of Shubunkins. Calico originally denoted three coloured varieties of goldfish that did not include blue. Blue is the most prized colour in Shubunkins. The overlapping patches of red, white, blue, grey and black (along with dark speckles) normally extend to the finnage of Shubunkins. However, the Shubunkins are calico goldfish they possess nacreous scales (an intermediate between metallic and transparent scales that are pearly in appearance). They have streamlined bodies with well-developed and even fins. They were first bred in Japan, from crossbreeding the calico telescope eye goldfish (Demekins), comet goldfish, and the common goldfish c. Shubunkins are similar to the common goldfish and comet goldfish in appearance. 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.ĭescription Shubunkin in an aquarium with Koi carp in the background. Shubunkins ( Japanese: 朱文金, Hepburn: Shubunkin, ' vermilion brocade') are a hardy, single-tailed goldfish with nacreous scales and a pattern known as calico. ![]()
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