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Koi for sale / Benigoi Mix EXK-K3381
Benigoi Mix

EXK-K3381

Benigoi Mix - Momotaro (18-21cm)

In stock at Sidcup

£150.00

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Delivery

£30.00

Expected between Tuesday 24th February and Thursday 26th February

UK mainland delivery for koi is charged at £30.00. Delivery of any dry goods within your order is calculated separately.

Key features

  • Variety: Benigoi
  • Gender: Unknown
  • Age: Tosai - 1 year
  • Size: 18-21cm
  • Breeder: Momotaro

Delivery and collection

We aim for next working day delivery for most orders placed before 2:30 pm, Monday to Thursday, provided the item is in stock. For live fish, we use a specialised DX overnight courier service, available Monday to Thursday.

While the delivery itself is next day, please note that livestock orders require a minimum of 24 hours' notice before dispatch. Please be aware that all deliveries rely on third-party couriers. While we do our best to ensure timely arrival, we cannot be held liable for any delays. Someone must be present to sign for livestock deliveries.

For full details on our delivery services, including specific charges and our DOA policy for live fish, please read more about our delivery policy.

Returns

At Exclusively Koi, we offer a 28-day return policy on most items, provided they're unused and in their original packaging. Please note that livestock is non-returnable due to biosecurity reasons. If you need to start a return or have received a damaged/incorrect item, contact us at info@exclusivelykoi.co.uk.

For full details on our returns process, including information on exchanges and refunds, please refer to our returns policy.

Product description

These Benigoi tosai from Momotaro Koi Farm display vibrant uniformity and strong early development.

Each koi shows a rich, even red (beni) coloration that extends consistently from head to tail, with no visible pattern breaks. The color appears thick and well-saturated, suggesting good stability as they mature. Subtle scale alignment is visible beneath the smooth surface, giving a clean, refined texture.

The bodies are streamlined and proportionate, with balanced tail tubes and good pectoral fins—ideal traits for growing tosai. As they develop, the depth of red and overall body volume are expected to strengthen, enhancing their bold, solid presence in the pond.

Overwintering is available till the end of March 31st 2026.

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Exclusively Koi Reviews

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27 reviews

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27 Reviews

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C

Cleaner Ponds

4 months ago
full star full star full star full star full star

A very large selection of high quality Japanese koi at affordable prices.

I

Ian Key

10 months ago
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Most impressed with Exclusively Koi. Recieved a Columbo pond test kit from them which was sealed and very well wrapped. On opening the inner tray that holds the bottles was very damaged. They offered to replace kit straight away. Customer service second to none. Thank you.

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Charlie Cole

10 months ago
full star full star full star full star full star

Great couple to do business with, very knowledgeable about their trade and patient with someone who knows very little! Would recommend and hope to use again.

S

Sharif Haque

11 months ago
full star full star full star full star full star

Absolutely top class koi collection. Easily the highest quality Japanese koi I've ever seen. Also owner is a very nice person who knows his stuff.

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Sean Burke

1 year ago
full star full star full star full star full star

We visited Exclusively koi for the first time today and I cannot praise Kevin enough. He has the highest customer service and is extremely personable and had time to talk to us and gave so much advice and information it was an absolute delight. He knows his subject and is driven by supplying the best quality not only in the fish but also in other stock items and food. The prices were excellent and he is very, very fair and customer oriented. His information was straightforward and honest and I highly recommend Exclusively koi to anyone. We will be going back and Kevin and the team will be our go-to for all our koi needs from now on.

C

Charlotte

1 year ago
full star full star full star full star full star
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Eva Vargas

1 year ago
full star full star full star full star full star

I came across Exclusively Koi by complete chance as i was looking up koi auctions online and I was lucky enough to find Kevin's fantastic koi up for auction. I took part in some of those auctions and was fortunate enough to win some beautiful koi, Kevin has been very helpful throughout the entire process and was happy to keep the koi for me a bit longer to suit my needs. The koi got shipped out on my chosen day and they arrived the next day very safely packaged with plenty of air. Each koi is even more beautiful in person and they're bigger than i expected which is a very pleasant surprise. The koi are currently dealing with some stress from the long journey here but Kevin is very quick to answer any of my questions and offer advice to help the koi get settled in. Very grateful for the great customer service and i can definitely see myself emptying my entire bank account at Exclusively Koi. I decided to attend the national Koi show today, I was pleasantly surprised to see exclusively koi had a stall at the show! Dare I say they had some of the nicest koi for sale but even more importantly the prices were extremely reasonable! If I had the room I would have easily bought several koi. Massive thanks to the team, keep up the good work

P

Paul Hazell

1 year ago
full star full star full star full star full star

Very nice fish at great prices

L

Lord Farquat

1 year ago
full star full star full star full star full star

Great priced japanese koi. Very impressed

C

Chesney Marshall

1 year ago
full star full star full star full star full star

Great guy with an incredible selection of koi. Could spend hours here.

FAQs

How do I know the Koi I’m purchasing is healthy?

We hand-select all our koi for their health, vibrant color, and overall quality. Healthy koi are active, have clear eyes, smooth scales, and eat well. We’re committed to providing only the best, and you can trust that every fish we sell has been well-cared for and is in prime condition.

How can I contact customer support if I have any issues or questions?

If you have any questions or concerns, feel free to reach out to our customer support team via email or phone. We’re here to help with everything from advice on koi care to any issues with your order.

Can Koi be kept with other fish?

Yes, koi can be kept with other fish, but it’s important to choose compatible species. Koi generally do well with larger, non-aggressive fish like goldfish and some varieties of pond fish. Avoid smaller, delicate fish that koi might see as food or more aggressive species that could stress or injure your koi.

How are the koi shipped safely?

We take extra care to ensure your koi arrive healthy and stress-free. Each fish is carefully double bagged with fresh packing water, oxygen and placed in a sturdy shipping box, and shipped overnight via DX our licensed couriers.

We ship Tuesday,Wednesday and Thursdays for next day delivery, ensuring the safest journey for your koi.

For more information about how we ship koi, visit our koi delivery page

How fast do koi grow?

Koi grow at varying rates depending on their environment, diet, and genetics. On average, koi can grow about 10-20cm per year in basic ponds, where as some koi can grow 30-40cm a year in a higher quality ponds especially if they’re fed high-quality food like Saki-Hikari Growth. This is depending on the variety and care they receive.

What are the different types of Koi available?

Koi come in a wide variety of types and patterns. Some of the most popular varieties include Kohaku (white with red markings), Showa (black with red and white), Sanke (white with red and black), and Asagi (blue-grey with red underbelly). We offer a range of types, so you can find koi that suit your pond and aesthetic preferences.

What do I do if my Koi looks stressed after shipping?

If your koi appears stressed after shipping, give them time to adjust. Float the sealed bag in your pond for 20-30 minutes to let them acclimate to the water temperature. Gradually add small amounts of pond water to the bag before gently releasing them. It’s normal for koi to be a little lethargic at first. Monitor them closely and avoid feeding for the first 24 hours to reduce stress.

Ensure the water parameters are correct, minimise handling, and provide a calm environment. Stressed Koi often recover after a few days. The health of our fish is important to us, so please do not hesitate to contact us if you have any concerns upon receipt of your Koi.

What should I look for in a reputable Koi dealer?

A reputable koi dealer should have a strong track record, healthy fish, and transparent practices. Look for a dealer who prioritises the health of their koi, offers proper care advice, and has good customer reviews. Ideally, they should also have strong ties to Japanese breeders and an understanding of koi genetics. Trust your instincts — if the fish or facilities don’t look right, it’s best to look elsewhere.

What water conditions are best for Koi?

Koi thrive in water with a pH between 7.0 and 8.5, and temperatures around 65-75°F. It’s important to maintain high water quality, with zero ammonia and nitrites and low nitrate levels. Stable water parameters and good filtration are key. Regular testing of pH, ammonia, and other water quality factors is crucial for maintaining a healthy environment for your koi.

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