Are Koi & Goldfish Different?

Are Koi and Goldfish different?

Goldfish and Koi are both selections of carp, but from two different families. Goldfish are mutations from crucian carp and Koi are from common carp. In general, goldfish tend to be smaller than koi, and have a greater variety of body shapes, and fin and tail configurations. Koi varieties tend to have a common, cigar shaped body, but have a greater variety of coloration and color patterns. They also have prominent barbs on their lip and large, broad heads.