Tsumugi Medaka

Bring refined beauty to your medaka collection with the Tsumugi Medaka (Japanese name: 紬メダカ), a graceful lamé variety developed by Mimu Medaka (美夢めだか). Its name, inspired by traditional Japanese silk fabric, reflects the soft shimmer and structural balance that define this line. Each purchase includes 1 male and 1 female, hand-selected for quality and imported with care.

Learn more about the Tsumugi Medaka on our Medaka Encyclopedia page.

  • Creator: Mimu Medaka (美夢めだか)
  • Key Traits: Fine silver and gold lamé, soft-toned body, aurora-like glow
  • Suitable View: Side and top view; ideal for both bowls and tanks


This strain was first imported to the U.S. in Fall 2024, after acquiring the original strain from its creator, Mimu Medaka at a medaka festival in Fukuoka. In Spring 2025, SNR Korea bred offspring from the original line, which were then re-imported by SNR USA to provide healthy, well-acclimated fish for U.S. hobbyists.

Understanding Live Fish Options

Here’s a quick guide to help you choose the right option when purchasing live medaka from our shop. Sizes and sexing are carefully selected, but please note that fish may vary slightly by strain, age, and growth rate.

Juvenile (Unsexed)

Young fish, typically 1.0–2.5 cm in size. They are too early to sex and often have not fully developed their final traits yet. As such, they are not graded for color, pattern, or fin type at this stage.

Female

Confirmed female medaka, usually 2.5–3.5 cm. Selected by experienced staff, but please note that 100% accuracy cannot be guaranteed for younger fish.

Male

Confirmed male medaka, also typically 2.5–3.5 cm. Identified by fin shape and behavior, but final confirmation may develop with maturity.

Breeding Pair (1 Male + 1 Female)

One male and one female—ideal for those starting a breeding line or looking for a guaranteed pair.

Trio (2 Females + 1 Male)

One male and two females. This setup helps maximize egg production and is commonly used by breeders.

SS Grade Pair

A premium hand-selected male and female pair with top-level traits. These are our highest-grade specimens, chosen for exceptional color, form, and balance — ideal for serious breeders and collectors.

⚠️ Please note: Sexing is done to the best of our ability at the time of shipping. Juveniles cannot be sexed or graded for traits. Some strains—especially short-body types like Daruma—naturally grow smaller than standard-bodied medaka. In some cases, longfin or swallow-tail varieties may be difficult to sex accurately due to their flowing fins and slower development. If you believe there is an error in the sex of the fish you received, please don’t hesitate to reach out via our Contact Us page.

🐟 If your goal is serious breeding, we highly recommend purchasing multiple breeding pairs or at least two trios. Just like people, medaka have their own personalities and chemistry — and not all combinations will result in successful breeding. Having more than one group increases your chances of forming compatible pairs and achieving strong egg production.
Option: 2 Juveniles (unsexed)

Get more, save more! 🎉

Buy quantityDiscount
Buy 2 - 3Get 5% off
Buy 4 - 5Get 10% off
Buy 6+Get 15% off
$50.00
Tax included. Shipping calculated at checkout.
  • All photos shown are original images taken by SNR MEDAKA USA. Unauthorized use, reproduction, or distribution is strictly prohibited. Photos are for reference only — actual fish may vary.
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  • 4 stars: 0 (0%)
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Erica

We’ve had our Tsumugi medaka for a week and we can’t stop watching them. They are animated little fish and depending on where they are in the tank, they might look more silver or even opalescent. Their heads are especially pretty; ours have a teal shimmer to them. When they pass in front of our dark rock cave, the edges of their fins seem to glow almost an electric blue. It’s so cool!

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Anonymous

The fish are healthy and looks awesome!!