Nishikigoi, better known as koi fish, are a well-known variety of the common carp. ... Thanks to selective breeding and an FGFR1 gene mutation, it lacks scales, so its skin is smooth.

Koi fish, especially the Kohaku variety, are prized for their beauty, longevity, and breeding potential. Factors like bloodline, pattern, size, and gender influence their value, with females often ...

The most expensive koi is a tricolor variant, one sporting orange, black and white scales. An imported tricolor Gosanke koi will sell for at least $2,500, according to Koscielski.

Nishikigoi, better known as koi fish, are a well-known variety of the common carp. ... Thanks to selective breeding and an FGFR1 gene mutation, it lacks scales, so its skin is smooth.