Commons are the original goldfish, not bred for modifications in any way. Comets look much like commons, but they have much longer (single) tails with a very deep fork. Both commons and comets can reach lengths over 12 inches at maturity. Shubunkins have a body shape like commons and comets, but they are calico fish. The calico colors may not be present in baby shubunkins, as it takes a while to develop. Shubunkins usually grow to about 9 inches long, although they can be larger depending on pond conditions.
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