What is the difference between japanese koi and israeli koi

We have lost a lot of koi because of mistakes we made getting started as koi parents. If you want to know about the mistakes we have made and how to avoid them sign up for our survive and thrive mini course. Koi Fish Blog. A Guide to Koi Fish. Table of Contents. Introduction to Koi. Raising Koi. Koi Feeding. Breeding Koi. Buying Koi. Types of Koi. Koi Products We Love. Koi Fish Gallery. They're considered mature 3 years old when they're about 10 inches long.

If they're between 3 and 10 inches, they're still juveniles and may be difficult to sex. Clue 2: Body Shape Immobilize your koi by capturing it in your pond net and take a look at it from above. A mature male koi will have a slender looking body, while a female koi will have a rounded body, particularly when it's spawning season and she's carrying a nest full of eggs! Clue 3: Fin Shape Next, examine your koi's fins. A male koi's pectoral fins, the ones near his head, will appear pointed and solid in color.

In addition, the first ray of his pectoral fin may be more substantial when compared to his female counterpart, which will display rounder fins.

Clue 4: Tubercles During breeding season, you may see little white growths, called tubercles, on male koi's heads and pectoral fins. They're perfectly natural and will disappear once the fish have finished getting frisky. Females don't develop these protrusions. The modern day koi is derived from these early coloured varieties. So, technically, there is only Japanese koi. However, there are kois bred elsewhere using Japanese koi brood-stocks, either directly or indirectly.

Most hobbyists regard kois from Japan as the standard bearer, although good kois can be had from breeders in many other countries, such as Taiwan mainly using Japanese brood-stocks. Israel has a thriving koi breeding industry, although the quality is still far from the Japanese or even the Taiwanese varieties. Hope this brief explanation helps. Thread Tools. The time now is PM.