Shubunkins (朱文金 translated literally as "red brocade") are a hardy, single-tailed fancy 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 Common goldfish.

Shubunkins are similar to the common goldfish and comet goldfish in appearance. They were first bred in Japan, from mutations in telescope eye goldfish (Demekins) c. 1900. They have streamlined bodies with well-developed and even fins. However, the shubunkins are calico goldfish; they possess nacreous scales (a mix of 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.