Weight. The average weight a quality koi fish can be expected to reach is around 12 pounds and they regularly get quite a bit larger, but Big Girl shocked everyone with her weight. The worlds biggest koi fish weighed in at 90 pounds in 2007, that is a big koi!

What is a jumbo koi?

The definition of “Jumbo Koi” is actually quite vague. It has been misused or overused by many dealers in the industry. At Kodama Koi Farm, we define “Jumbo” as Koi that are at least 60cm or 24 inches long. … Some Koi can grow over 1 meter or 40 inches. As Koi grows jumbo, the pattern, the color, the body change.

How old is a 2 inch koi?

Depending on what you feed them and how well there water is filtered and cleaned and doing water changes regularly, at least once a week, a 2 inch Koi can reach 24 inches in two years, some are slower growers and some are bred to get huge, like an easy 3 feet long, but that is just certain breeds of Koi, that will get …