Healthy, young koi to see grow & develop in your pond
These young, healthy koi are full of promise and personality. At 13–15 cm, both butterfly and standard fin varieties are already showing what they’ll become: clear, clean heads, balanced body shape, and a beautiful natural luster that really catches the light. Their patterns are just beginning to form, and as they grow, you can expect the colours to deepen and sharpen over time, making them even more striking year after year.
What you see is truly what you get—the koi shown in the photos is the exact fish you’ll receive when you order from Windsor Fish Hatchery. No surprises, just honest, high-quality koi raised with care. One of the real joys of buying koi at this stage is watching them grow and develop in your own pond, season after season, becoming a living part of your garden.
All fish leave the farm on a Monday to ensure safe transit and typically arrive Tuesday or Wednesday, minimizing stress and maximizing health. Every koi is shipped with care and comes with a live arrival and health guarantee, so you can buy with confidence.
If you’re looking for koi with strong potential and the excitement of watching them mature into something truly special, these fish are a fantastic choice.
The koi shown in the photos is the exact fish you will receive.
Photos are taken from multiple angles. A video is recorded before the photos so you can see the fish swimming naturally.Healthy, Well-Prepared Koi
All koi are carefully conditioned before sale to ensure low stress and easy adjustment to their new pond. Fish are shipped using hospital-grade purified oxygen and packed in insulated boxes to keep them safe and comfortable during transport.
Easy Acclimation
Clear acclimation instructions are included on the fish bag. The process is simple and takes 5–10 minutes.
Our Koi Care Process
We take all koi photos ourselves. After photos, koi are moved to large, oxygen-rich ponds before being listed for sale. New koi are added to the website every week.
Shipping Information
We do not ship live fish during short weeks. Public holidays are non-shipping weeks. Fish are shipped every Monday, with delivery expected Tuesday or Wednesday.
The order cut-off is Saturday at 5:00 pm. Orders placed after 5:00 pm Saturday will ship the following fortnight. If you would like your fish shipped on a different Monday, please write this in the checkout comments and we will confirm with you.
Fish Details & Measurements
All information such as size, sex, and type is approximate. Size is measured from nose to tail in the water using a ruler placed along the pond, as fish do not like to be held still. Sex is only listed for larger koi that are not showing stress, as young koi are difficult to sex accurately. Every purchase is backed by a live-arrival guarantee and over 40 years of trusted experience.
Type of Koi Fish
All koi sold by Windsor Fish Hatchery are bred on-site. We do not buy or resell koi. We do not provide price estimates for private or commercial koi; only koi we produce are priced. Our breeding records allow us to tell you with 100% accuracy what type of koi you are purchasing.
Selective Breeding & Quality
Our koi are selectively bred to produce specific, high-quality types. Each spawning produces koi of different grades and sometimes different types. We conduct approximately six selective spawns per year. Higher-grade koi cost more due to quality, colour, and development.
If you're looking for high-quality food for your koi, we have it here.
Before your fish arrive match your pH to ours 7.8
