Abstract
Abstract Six fish collected from an ornamental pond in Tauranga were identified as hybrids between koi (Cyprinus carpio) and goldfish (Carassius auratus) by using meristic, morphometric, and electrophoretic characters. The hybrids were intermediate between koi and goldfish for the number of lateral line scales, the shape of the pharyn‐geal teeth, and the presence of a pair of reduced posterior barbels. At fifteen diagnostic enzymatic and protein loci which distinguish koi and goldfish, the hybrids appeared as heterozygotes. The close similarity of the six fish in meristic, morphometric, and electrophoretic characters suggests they were derived from the same parents.
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