Kohaku Swordtail XL

(1 customer review)


7-8 cm

Common Name: Kohaku Swordtail

Latin Name: Xiphophorus hellerii

Latin Name Translation: The genus Xiphophorus translates to “sword-bearer,” while “hellerii” is named after the German naturalist Karl Heller. Synonyms: None noted.

Distribution: The Kohaku Swordtail is a selectively bred variant of the common Swordtail (Xiphophorus hellerii), which is native to Central America, specifically Mexico and Guatemala.

Max Size: Kohaku Swordtails can grow up to a maximum size of around 4 inches (10 cm) for males and slightly larger for females.

Lifespan: Under proper care, Kohaku Swordtails can live for about 2-5 years.

Temperature Range: Kohaku Swordtails prefer a temperature range of 72-82°F (22-28°C) for optimal health and activity.

pH Range: They thrive in slightly alkaline to neutral water conditions, with a pH range of 7.0-8.0.

KH Range: A moderate carbonate hardness (KH) level of 4-10 dKH is suitable for Kohaku Swordtails.

Care Level: Kohaku Swordtails are considered to have a moderate care level, requiring basic attention to water parameters, regular feeding, and a suitable environment.

Lighting Preference: These swordtails do not have specific lighting preferences and can adapt to a variety of lighting conditions.

Suitable for Planted Tanks: Yes, Kohaku Swordtails can be kept in planted tanks. They are generally peaceful and won’t harm most aquatic plants.

Preferred Food: Kohaku Swordtails are omnivorous and will readily accept a variety of foods. Offer them a balanced diet that includes high-quality flakes or pellets, supplemented with occasional live or frozen foods like brine shrimp or daphnia.

Behaviour: Kohaku Swordtails are generally peaceful and sociable fish. They are active swimmers and appreciate a well-decorated tank with hiding places and open swimming areas.

Discoverer: The Kohaku Swordtail is a selectively bred variant, so there is no specific discoverer associated with this particular colour morph.

Interesting Facts:

  • The Kohaku Swordtail is named after the traditional Japanese Koi variety known as “Kohaku,” which features a solid white body with red markings.
  • This selectively bred variant displays vibrant red and white coloration on its body, reminiscent of the Kohaku Koi.
  • Kohaku Swordtails are popular among hobbyists for their striking appearance and peaceful nature.
  • They are livebearers, meaning they give birth to live young instead of laying eggs.
  • With proper care and breeding, it is possible to create different colour variations and patterns within the Swordtail species.

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Aquarium Plants: Are shipped the same as and can be mixed with Dry goods *Free shipping on orders over £50 or £6.99 for orders under £50. Some geographical restrictions may apply.

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The Kohaku Swordtail XL is a visually stunning fish that showcases a vibrant display of colours. Its body is elongated and streamlined, with a flattened head and a pointed mouth. The most distinctive feature of this fish is its red and white coloration, resembling the traditional Japanese Koi variety known as “Kohaku.” The red coloration typically covers the upper portion of the body, while the lower portion is adorned with a clean, crisp white. This striking combination of colours creates a visually striking appearance that adds a touch of elegance to any aquarium.

Natural Habitat:

In its natural habitat, the Swordtail can be found in freshwater environments with moderate vegetation. It is native to Central America, specifically Mexico and Guatemala, where it inhabits rivers, streams, and ponds. These habitats provide the fish with ample space to swim and explore, as well as an abundance of plant life that offers shelter and hiding places.

Keeping Kohaku Swordtail XL Healthy:

Keeping Swordtails healthy requires providing optimal care and maintaining suitable water conditions. This fish thrives in a well-maintained aquarium with stable water parameters. The water temperature should be kept between 72-82°F (22-28°C), with a pH range of 7.0-8.0 and a moderate hardness level (4-12 dKH). Regular water changes and filtration are essential to ensure good water quality.

Special Requirements and Feeding:

The Kohaku Swordtail XL does not have any specific special requirements. It is an omnivorous species that will readily accept a variety of foods. A balanced diet can be achieved by offering high-quality flake or pellet foods formulated for tropical fish. It is also beneficial to supplement their diet with live or frozen foods such as brine shrimp, bloodworms, or daphnia to provide additional nutrients.

How Many Should I Keep:

To maintain a harmonious social dynamic, it is recommended to keep one male Kohaku Swordtail XL for every two to three females. This ratio helps to minimize aggression among the males and provides a more balanced environment.

Lighting Preference:

Kohaku Swordtail XL does not have specific lighting preferences and can adapt to various lighting conditions. Providing a natural day and night cycle with appropriate lighting duration is sufficient for their well-being.

Suitable Tank Mates:

The Kohaku Swordtail XL is generally a peaceful fish that can coexist with other peaceful community fish. It can be kept with species such as tetras, guppies, mollies, and other swordtails. However, it is advisable to avoid keeping them with aggressive or fin-nipping species to prevent any conflicts.

Breeding Kohaku Swordtail XL:

Breeding the Kohaku Swordtail XL is possible in a well-maintained aquarium with separate breeding tanks or ample hiding places for the fry. The females give birth to live fry after a gestation period of approximately 4-6 weeks. It is recommended to remove the pregnant female to a separate tank to protect the fry from potential predation by adult fish.

Sexual Dimorphism:

Male Swordtails can be distinguished from females by their longer and more elaborate tail fin, which often displays vibrant colours and intricate patterns. Females, on the other hand, have a more rounded and less elongated appearance.


Under proper care, the  Swordtails can live for about 2-5 years. Providing a suitable environment, a balanced diet, and maintaining optimal water conditions are essential factors in maximizing their lifespan.


The Kohaku Swordtail XL is a selectively bred variant of the common Swordtail (Xiphophorus hellerii). While the original wild fish of this variant is native to Central America, the Kohaku Swordtail XL available in the aquarium trade is
typically bred in captivity or through selective breeding programs. The original wild fish from which the Kohaku Swordtail XL originates can be found in the rivers and streams of Mexico and Guatemala.


The Kohaku Swordtail XL is a visually captivating fish with its stunning red and white coloration reminiscent of the Kohaku Koi. It requires a well-maintained aquarium with stable water conditions and a balanced diet to thrive. With a peaceful temperament, it can coexist with various community fish species. Breeding is possible with proper care, and males can be distinguished by their more elaborate tail fins. With a lifespan of 2-5 years, the Kohaku Swordtail XL adds beauty and charm to any freshwater aquarium, making it a popular choice among fish enthusiasts.



1 review for Kohaku Swordtail XL

  1. Alexandra Walker (verified owner)

    I was not prepared for how beautiful these girls are!! They’re absolutely huge and stunning and I’m in love with them! They came with some accidental babies as well who are thriving!

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Dry Goods Delivery.

The store has provided information regarding their order dispatch and estimated delivery times. Here are the key details:

  1. Dispatch Timeframe: Orders placed before 2pm will be dispatched on the same day. Orders placed after 2pm will be dispatched on the next working day.
  2. Delivery Date and Time Guarantee: While the store aims to dispatch orders promptly, they cannot guarantee a specific delivery date and time. As the delivery process relies on couriers, there may be factors beyond their control that could affect the delivery timeframe.
  3. 1st Class Mail: For orders sent via 1st Class mail, the aim is to have them delivered on the next working day after dispatch.
  4. 2nd Class Mail: Orders sent via 2nd Class mail typically take approximately 2-3 working days for delivery after dispatch.
  5. APC Next Day Delivery: APC Next Day delivery is available for UK mainland postcodes. It is usually delivered on the next working day after dispatch. However, please note that items being delivered to more remote areas may require additional time for delivery.

It’s important to keep in mind that while the store strives to provide efficient delivery services, unforeseen circumstances or external factors could potentially impact delivery times. For further details or specific inquiries about delivery, customers should refer to the store’s terms and conditions or contact the store directly.

Livestock Delivery.

The store maintains specific policies regarding the delivery of livestock. Here are the key points:

  1. Licensed Livestock Courier: The store exclusively uses a licensed livestock courier for shipping fish and coral. This approach is chosen to ensure responsible and ethical transportation of the livestock.
  2. Livestock Shipping Fee: The livestock shipping fee charged to customers of £19.99 does not cover the true cost, and therefore, there is a minimum spend requirement of £30.00 before the option for livestock shipping becomes available.
  3. Pre-Arranged Delivery: The store never ships livestock without first arranging a suitable delivery day. Before dispatching the livestock, the store must confirm the agreed-upon delivery day with the customer.
  4. Saturday Delivery Confirmation: Customers who choose Saturday delivery must have their availability confirmed for the upcoming Saturday before the store sends out the livestock. This confirmation ensures that the livestock can be received promptly.
  5. Failure to wait for livestock: Not waiting for livestock, even if there is a reasonable delay, or cancelling an order after it has been dispatched will lead to you incurring charges for an emergency return to the base. Additionally, any losses of livestock will also be charged to you. Please be aware that the items you are ordering are living creatures – livestock. We kindly ask that you refrain from ordering livestock if you are unable to accommodate the possibility of a delayed delivery.

    These terms and conditions are a fundamental aspect of our policy. Our primary goal is to dissuade individuals who could react negatively to a delayed delivery and subsequently request order cancellations. It is of utmost importance to underscore that your order pertains to living creatures, not mere inanimate objects. In the event of an occasional delay, it is crucial that you respond in a rational and responsible manner, taking into account the welfare of the livestock. We kindly request that you refrain from placing an order for livestock if you tend to react strongly to such situations. By proceeding with the order of livestock, you indicate your acceptance and agreement to abide by these specified terms and conditions.

  6. Signature Requirement: Livestock deliveries require a signature upon receipt and cannot be left in a safe location. This precaution ensures proper handling and the well-being of the livestock.
  7. Geographic Restrictions: The courier has strict geographic restrictions for livestock deliveries. Unfortunately, deliveries to Northern Ireland, Republic of Ireland, Isle of Man, Isles of Scilly, Channel Islands, and certain Scottish offshore postcodes may not be possible. Customers are encouraged to contact the store via email to confirm if livestock delivery is available in their area.
  8. Minimum Order Value and Order Cancellations: The store has a minimum order value of £30 for livestock shipping. Additionally, the store reserves the right to cancel orders that are deemed high-risk or involve a high number of single tropical freshwater fish species.

It is essential for customers to familiarize themselves with these policies before making a purchase. For more detailed information or specific inquiries, customers should consult the store’s terms and conditions or reach out to the store directly for clarification.

Livestock Geographical Exemptions.

The store has specific geographical exemptions for livestock deliveries. Here is a list of the areas and postcodes where livestock delivery is not available:

  1. Islands: Livestock cannot be delivered to the Shetlands, Channel Islands, and Isle of Man.
  2. Postcodes: Livestock delivery is not available to the following postcodes:
  • AB30 to AB39, AB41 to AB45, AB51 to AB56
  • DD8 to DD10
  • BT all
  • DG3 to DG9, DG12 to DG14
  • KA18 to KA19, KA26, KA29 to KA30
  • HS all
  • IM all
  • JE all
  • ZE all
  • KW15 to KW17
  • TD9
  • FK17 to FK21
  • GY all
  • KA26, to KA28
  • PA20 to PA38, PA41 to PA49, PA60 to PA61, PA76 to PA78
  • TR21, to TR25
  • PH3 to PH26, PH30 to PH44
  • IV all

Customers residing in these areas should be aware that livestock delivery is not available to their location.

We can ship livestock to the Isle of Wight, this area is subject to a surcharge.

For further information or specific inquiries about livestock delivery to a particular area, customers are advised to contact the store directly for clarification.


According to the store’s policy, customers have the right to cancel an order within 14 working days of receiving the goods. To initiate the cancellation, the goods must be returned to the store in new and unused condition, adhering to their Returns Policy.

Important points regarding the return process are as follows:

  1. Return Condition: The goods must be returned in new and unused condition, as originally received. It is important to ensure that the goods are in the same condition as when they were sent out.
  2. Return Timeframe: The goods must be received by the store within 21 days of notifying them about the cancellation. During this time, customers are responsible for any loss or damage that may occur during the return shipping process.
  3. Refund Process: Once the store receives the goods in new and unused condition, they will initiate the refund process. The purchase price will be refunded to the customer.
  4. Return Condition Inspection: If the returned goods arrive in a condition that is less than what they were sent out in, the store reserves the right to return the goods to the customer, and no refund will be processed.

It is essential for customers to carefully review the store’s Returns Policy and follow the specified procedures to ensure a smooth and successful return and refund process. For more detailed information or specific inquiries, customers should consult the store’s terms and conditions or contact the store directly.


According to the store’s return policy, the following guidelines should be followed for returning goods:

  1. Use Returns Form: Customers need to use the store’s provided returns form to initiate the return process. This form helps the store acknowledge that the goods are being sent back.
  2. Return for Testing: If the goods are being returned for testing, the customer is responsible for covering the return shipping expenses.
  3. Refund of Postage Fees: The store will only refund postage fees if the order arrives damaged or becomes faulty within the first 4 weeks of purchase. Proof of posting is important, and customers should ensure the goods are well-packed and obtain proof of posting as the goods remain their responsibility until received by the store.
  4. Refund of Postage Costs for Replacement: If goods are being returned within 7 days of purchase under the Replacement Policy, the store can refund postage costs. However, the customer needs to agree on a delivery service with the store in advance, and only standard or tracked shipping fees will be refunded. The store cannot refund the cost of any special delivery service.
  5. Non-Refundable Postage: Postage costs for goods returned for any other reason than those mentioned above are non-refundable. The store reserves the right to deduct the original postage cost from any applicable refund.
  6. Mistaken Purchases: If a customer has made a mistake in their purchase, they need to return the goods to the store. The customer is responsible for the return shipping costs in such cases.

It is important for customers to carefully follow the store’s return procedures and terms and conditions. For further details or specific inquiries, customers should refer to the store’s website or contact the store directly.


If customers receive faulty goods, the following guidelines apply according to the store’s policy:

  1. Notification of Faulty Goods: Customers must notify the store within 7 working days if they receive faulty goods. This notification should be made as soon as possible.
  2. Replacement Parts: If possible, the store will dispatch replacement parts for the faulty goods.
  3. Return of Goods: If replacement parts are not possible, the store may request customers to return the faulty goods in accordance with their Returns Policy. The specific return procedures and conditions should be followed.
  4. Verification of Damage: Once the store receives the returned goods, they will verify the damage. If the damage is confirmed, the store will supply the required replacements.
  5. Return Postage Costs: If the goods returned to the store are found to be in good working order, the store is not able to refund the return postage costs. Additionally, the store reserves the right to deduct their original postage cost from any applicable refund.
  6. Consequential Loss or Damage: The store cannot take responsibility for any consequential loss or damage that arises directly or indirectly from the goods supplied.

Customers should carefully review and adhere to the store’s Returns Policy and procedures for returning faulty goods. For further clarification or specific inquiries, customers should consult the store’s terms and conditions or contact the store directly.

Manufacturer’s Guarantees

The store works in collaboration with manufacturers to ensure that their guarantees are honored, and they make their best efforts to resolve issues within the warranty period. The following guidelines apply to refunds and replacements:

  1. Postage Costs under Manufacturer’s Guarantee: Postage costs can only be refunded if the goods are returned to the store within 7 days of the original purchase, as per the manufacturer’s guarantee.
  2. Refund of Postage Costs for Faulty Goods: The store will refund postage costs for guarantee/warranty returns only if the product becomes faulty within the first 4 weeks of receipt.
  3. Replacements with Manufacturer Authorization: Replacements, whether parts or goods, can only be offered when authorized by the manufacturer. Customers should contact the store for further guidance in such cases.
  4. Prior Approval for Returns: Goods should not be returned to the store without prior approval. Customers need to contact the store and obtain approval before returning any items.
  5. Replacement of Glass or Ceramic Items: Glass or ceramic items can only be replaced if the store is notified within 48 hours of receiving the delivery.
  6. Replacement of Glass Bulbs/Tubes: Glass bulbs or tubes can only be replaced if they become faulty within 14 days.

Customers should note and adhere to these guidelines to ensure a smooth and efficient resolution of any issues with their purchased items. For specific inquiries or further information, customers are advised to refer to the store’s terms and conditions or contact the store directly.


According to the store’s policy, customers have the following responsibilities regarding breakages:

  1. Checking Goods on Arrival: It is the customer’s responsibility to thoroughly check the goods upon arrival for any damage. This should be done before signing for the parcel. If the parcel appears damaged, it is advised not to sign for it.
  2. Reporting Breakages: Any breakages or damages must be reported to the store within 48 hours of receiving the goods. It is important to promptly notify the store to initiate the resolution process.

By carefully inspecting the goods upon arrival and reporting any breakages within the specified timeframe, customers can ensure that appropriate actions are taken to address the issue. For specific instructions on reporting breakages or further information, customers should refer to the store’s terms and conditions or contact the store directly.