Name: 15-18cm Japanese Butterfly Koi Tosai Koi Mix
Brand: Byer Koi Farm
Price: 40.0 GBP
Availability: InStock

15-18cm Japanese Butterfly Koi Tosai Koi Mix

Byer Koi Farm

£60.00 £40.00 Save £20.00

Tax included.

As part of our National Weekend celebration, this Japanese Tosai mix is available at special National Weekend pricing for a limited time. The same offers are available both online and in-store throughout the weekend, while stocks last.

Please note that, due to the popularity of this mix throughout the season, the photographs shown were taken earlier this year and are intended to illustrate the type and variety of koi available, rather than the exact fish currently in the tank. The current mix remains a colourful selection selected from the fish available at the time of ordering. You can see a video of the mix available for the National Weekend on the blog here: https://www.byerkoifarm.co.uk/blogs/blog/national-weekend-special-offers-preview-progress-updates-page

These Japanese Butterfly Koi have been selected from two of Japan’s best-known producers of longfin koi — Yamasan Koi Farm and Suda Koi Farm.

With their flowing fins and bright metallic colours, Butterfly koi are a striking addition to any pond. This mixed selection includes koi from both breeders and offers a varied mix of colours and patterns.

Many of these koi were introduced in our recent blog about Suda and Yamasan Japanese Butterfly Tosai arriving for Spring 2026.

Each koi measures approximately 15–18cm.

Online orders are selected personally by Adam or Amanda, using our experience to choose a balanced and attractive mix from the tank.

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Koi delivery is via a specialist overnight fish courier service that we have been using successfully for many years.

Local pickup is available; choose that option in the checkout process, then once purchased, contact us to arrange collection.

For dry goods, the vast majority of items ordered before midday are shipped the same day, on an overnight service.

Byer koi farm

UK breeder of champions

Pushing the boundaries is in our DNA, and now with Byer Koi Farm being a leading UK koi farm consistently producing champion winning koi, we are elevating the quality and perception of UK bred koi and contributing to the success of UK aquaculture

everyone contributes

Byer Koi Farm is a family business

Everyone lends a hand in peak season. Harvesting fry ponds and manning our stand at koi shows are just a couple of areas where the kids muck in.

farming koi the japanese way

Selection, selection, selection! Only a tiny proportion of each spawning makes the highest quality koi.

The year's we've spent optimising our breeding lines delivers better quality koi for our customers.

Testimonials

★★★★★
From Google Business Reviews: Absolutely exceptional. Wonderful, extremely health fish clearly very well reared and looked after. A credit to the breeder.
James Rogers
Watford, UK

★★★★★
From Google Business Reviews: Highly recommend the Koi Fry from this farm, the customer service, colour and quality of the fry was fantastic. I look forward to getting some older fish from the family run farm.
Keegan Rees
UK

★★★★★
From Google Business Reviews: Family run business with high quality koi. Well worth a visit
CATANDEYE KOI (YouTuber)
UK

★★★★★
From Facebook: Bought some fantastic koi which arrived this week.Great service and great communication start to finish. Will be back to buy some more
Ben Mort
UK

★★★★★
From Facebook: Great place, friendly team and absolutely great koi.
Darren Walker
UK

★★★★★
From Facebook: Unbelivable service from Adam and Amanda. Would recommend to anyone looking for quality koi.
Alex Dawson
UK

15-18cm Japanese Butterfly Koi Tosai Koi Mix

Testimonials

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