Premium Assorted Medaka Ricefish for Sale – 3cm Breeding Size, Ready to Breed

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Premium Assorted Medaka Ricefish for Sale
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Buy Premium Medaka ricefish (Japanese ricefish) online from The Shrimp Farm—carefully selected at a true 3cm breeding size, so they arrive mature, healthy, and ready to breed in your aquarium or outdoor tub setup. Unlike smaller, unsexed juveniles often sold elsewhere, these Medaka fish (Oryzias latipes) are fully developed and already showing strong coloration and behavior, making them ideal for both beginners and experienced hobbyists.

Known for their hardiness, peaceful temperament, and compatibility with shrimp, Medaka ricefish are one of the most versatile and rewarding nano fish in the hobby. They pair especially well with species like Neocaridina shrimp and Caridina shrimp for sale, making them a perfect choice for planted shrimp tanks. Every fish is health-checked and shipped with our live arrival guarantee, so you can order with confidence and receive thriving, high-quality livestock.

All of these fish are true 3cm breeding size — not juveniles like most online listings.


Premium Assorted Medaka Ricefish Quick Facts

  • Scientific Name: Oryzias latipes
  • Common Name: Medaka Ricefish / Japanese Ricefish
  • Size: ~3cm (breeding size)
  • Temperament: Peaceful, shrimp-safe
  • Care Level: Easy (great for beginners)
  • Diet: Omnivore (flakes, pellets, live/frozen foods)
  • Temperature: 60–78°F (very adaptable)
  • pH Range: 6.5–8.0
  • Tank Size: 5+ gallons (larger for groups)
  • Behavior: Active schooling fish, top to mid-water swimmer
  • Breeding: Easy—egg scatterers, often breed readily in home aquariums

Are Premium Medaka Ricefish Good for Beginners?

Yes—Premium Medaka ricefish are an excellent choice for beginners.  If you're new to the hobby, be sure to check out our Medaka care guide to learn how to set up the perfect tank and keep them thriving.  They are one of the hardiest fish in the hobby and can adapt to a wide range of water conditions, making them very forgiving for new aquarium owners.

Their small size, peaceful temperament, and simple care requirements make them easy to keep in both aquariums and outdoor tubs. Unlike more sensitive species, Medaka are resilient to minor fluctuations in temperature and water parameters, which helps reduce stress for beginners still learning tank maintenance.

Because our fish are sold at a true 3cm breeding size, they are already well-established and more stable than tiny juveniles. This means they acclimate quickly, eat readily, and are far more likely to thrive right away—giving new hobbyists a much higher chance of success.

Overall, if you're looking for a low-maintenance, active, and rewarding fish to start with, Medaka ricefish are one of the best beginner-friendly options available.

Can You Keep Premium Medaka Ricefish with Shrimp?

Yes—Premium Medaka ricefish are considered shrimp-safe and can be successfully kept with species like Neocaridina shrimp and Caridina shrimp. Their peaceful temperament means they typically ignore adult shrimp, making them a great addition to planted shrimp tanks.

Because Medaka are small and non-aggressive, they do not actively hunt shrimp like many larger fish. However, like most fish, they may occasionally eat very small baby shrimp (shrimplets), especially in open tanks without hiding spots.

To maximize shrimp survival, it’s best to provide plenty of cover such as moss, dense plants, or shrimp caves. In well-established planted tanks, shrimp populations usually thrive alongside Medaka without issue.

Overall, if you’re looking to add movement and activity to a shrimp tank without risking your colony, Medaka ricefish are one of the safest and most compatible fish you can choose.

Why Buy Premium Medaka Ricefish Online from The Shrimp Farm

True 3cm Breeding Size – Our Medaka ricefish are sold at a full ~3cm, meaning they arrive mature, healthy, and often ready to breed—unlike smaller juveniles commonly sold elsewhere.

Shrimp-Safe & Community Friendly – Peaceful and compatible with shrimp, snails, and other nano fish, making them perfect for planted and mixed aquariums.

Expertly Sourced & Health-Checked – Every fish is carefully selected, inspected, and acclimated to ensure you receive strong, active, high-quality livestock.

Fast, Safe Shipping – Professionally packed with care to minimize stress and ensure your fish arrive in excellent condition.

Live Arrival Guarantee – Buy with confidence knowing your order is backed by our industry-leading live arrival guarantee.

Ready-to-Breed Potential – Larger, established fish means faster results for hobbyists looking to breed and grow their colony.

Trusted by Hobbyists Nationwide – The Shrimp Farm is a go-to source for premium shrimp and nano fish, with a reputation for quality, consistency, and customer service.

BACKED BY THE SHRIMP FARM'S LIVE ARRIVAL GUARANTEE!

Medaka Ricefish vs Guppies: Which Is Better for Your Aquarium?

When comparing Medaka ricefish (Oryzias latipes) to guppies (Poecilia reticulata), both are excellent beginner fish—but they serve slightly different roles depending on your setup and goals. Medaka are known for their hardiness, cooler temperature tolerance, and outdoor adaptability, while guppies are prized for their bright colors and constant livebearing reproduction.

Medaka ricefish are often the better choice for hobbyists looking for a low-maintenance, shrimp-safe fish that can thrive in a wide range of environments, including unheated tanks and outdoor tubs. Because our Medaka are sold at a true 3cm breeding size, they are already mature and ready to establish quickly.

Guppies, on the other hand, are more tropical and require warmer, stable conditions. While they breed easily, they can sometimes nip fins or snack on baby shrimp, making them slightly less ideal for shrimp-focused setups.

 

Feature Medaka Ricefish Guppies
Scientific Name Oryzias latipes Poecilia reticulata
Care Level Very Easy Easy
Temperature 60–78°F (can go cooler) 72–82°F (tropical)
Beginner Friendly Excellent Excellent
Breeding Type Egg layer Livebearer
Breeding Difficulty Easy Very easy
Shrimp Compatibility Shrimp-safe May eat baby shrimp
Temperament Peaceful Semi-peaceful (can nip)
Outdoor Use Excellent (tubs/ponds) Not recommended
Maintenance Level Low Moderate

Premium Medaka Ricefish Care Guide

Medaka ricefish (Oryzias latipes) are one of the most adaptable and beginner-friendly fish in the hobby. Their hardiness, peaceful nature, and ability to thrive in a wide range of conditions make them ideal for aquariums, planted tanks, and even outdoor tubs. When properly cared for, Premium Medaka ricefish at 3cm breeding size will acclimate quickly, display natural behavior, and often begin breeding soon after introduction.


Ideal Tank Setup for Medaka Ricefish

Medaka are highly flexible but thrive best in a simple, stable environment:

  • Tank Size: 5+ gallons (10+ gallons recommended for groups)
  • Substrate: Sand or fine gravel
  • Plants: Live aquarium plants like moss, guppy grass, and floating plants
  • Filtration: Sponge filter or gentle flow filter
  • Lighting: Moderate (enhances color and plant growth)

They are top-to-mid swimmers, so leaving some open swimming space while providing plant cover works best.


Water Parameters

One of the biggest advantages of Medaka is their ability to tolerate a wide range of conditions:

  • Temperature: 60–78°F (can tolerate cooler temps than most fish)
  • pH: 6.5–8.0
  • Hardness: Soft to moderately hard water
  • Water Changes: 20–30% weekly

Because they are so adaptable, stability is more important than chasing exact numbers.


Feeding Medaka Ricefish

Medaka are omnivores and easy to feed:

  • High-quality flakes or micro pellets (daily staple)
  • Live or frozen foods (brine shrimp, daphnia, bloodworms)
  • Occasional plant-based foods

Feed 1–2 times daily in small amounts. A varied diet helps improve coloration and breeding activity.


Behavior and Tank Mates

Medaka ricefish are peaceful and community-friendly:

  • Do best in groups of 5–6 or more
  • Active, social swimmers
  • Compatible with shrimp like Cherry shrimp for sale and Caridina shrimp
  • Great with other small, non-aggressive fish

Avoid large or aggressive species that may bully or eat them.


Breeding Medaka Ricefish

Medaka are one of the easiest egg-laying fish to breed:

  • Females carry eggs briefly before depositing them
  • Eggs are usually attached to plants or spawning mops
  • Fry hatch in about 1–2 weeks depending on temperature

Because these fish are sold at 3cm breeding size, they are often ready to reproduce shortly after acclimation.


Outdoor Tub & Pond Setup

Medaka are famous for thriving outdoors:

  • Can be kept in tubs, patio ponds, or small outdoor setups
  • Tolerate seasonal temperature swings (within reason)
  • Natural sunlight enhances coloration and breeding

This makes them one of the most versatile fish for both indoor and outdoor hobbyists.


Acclimation Tips

To ensure success when your fish arrive:

  1. Float the bag for 15–20 minutes to match temperature
  2. Slowly add tank water over 20–30 minutes
  3. Gently net fish into the tank (avoid adding bag water)

Because these are larger, established 3cm fish, they typically acclimate faster and with less stress than small juveniles.


Common Mistakes to Avoid

  • Overfeeding (can quickly impact water quality)
  • Keeping too few (they thrive in groups)
  • Lack of plant cover in shrimp tanks
  • Sudden temperature swings

Final Thoughts

Premium Medaka ricefish are one of the easiest and most rewarding fish you can keep. Their durability, peaceful nature, and ready-to-breed 3cm size make them perfect for beginners while still offering plenty of interest for experienced hobbyists. With proper care, they will thrive, display natural behaviors, and often reproduce regularly—making them a standout addition to almost any setup.

Premium Medaka Ricefish FAQ

Are Medaka ricefish good for beginners?

Yes, Medaka ricefish are one of the best fish for beginners. They are extremely hardy, adaptable to a wide range of water conditions, and easy to care for. Their peaceful nature and simple feeding requirements make them a great choice for both new and experienced aquarium hobbyists.


What size are your Medaka ricefish?

Our Premium Medaka ricefish are sold at approximately 3cm breeding size, meaning they are mature, well-established, and often ready to breed shortly after introduction to your tank. This is larger and more developed than many fish sold online.


Can Medaka ricefish live with shrimp?

Yes, Medaka ricefish are considered shrimp-safe and can be kept with species like Neocaridina shrimp and Caridina shrimp. They are peaceful and typically will not bother adult shrimp, making them ideal for planted shrimp tanks.


How many Medaka ricefish should I keep together?

Medaka ricefish do best in small groups of at least 5–6 fish. Keeping them in groups helps reduce stress and encourages natural schooling behavior, activity, and breeding.


What do Medaka ricefish eat?

Medaka are omnivores and will readily accept high-quality flakes, micro pellets, and live or frozen foods such as brine shrimp, daphnia, and bloodworms. A varied diet helps enhance their health and coloration.


What temperature do Medaka ricefish need?

Medaka ricefish are very adaptable and can thrive in temperatures ranging from 60–78°F. They are one of the few aquarium fish that can also do well in unheated indoor tanks or outdoor tubs in mild climates.


Are Medaka ricefish easy to breed?

Yes, Medaka ricefish are known for being easy to breed. They are egg scatterers, and females often carry eggs before depositing them on plants or spawning mops. With proper conditions, they will breed regularly in home aquariums.


Can Medaka ricefish live in outdoor ponds or tubs?

Yes, Medaka ricefish are excellent candidates for outdoor setups such as patio ponds or tubs. They are hardy and can tolerate temperature fluctuations better than many tropical fish, making them popular for seasonal outdoor breeding.


How long do Medaka ricefish live?

With proper care, Medaka ricefish typically live 2–4 years. Providing clean water, a balanced diet, and stable conditions will help maximize their lifespan.

Do Medaka ricefish need a heater?

Medaka ricefish do not require a heater in most setups. They are naturally adaptable to a wide temperature range of 60–78°F, making them one of the few aquarium fish that can thrive in unheated indoor tanks or even outdoor tubs in mild climates. However, in colder environments where temperatures may drop below this range, a heater can help maintain stability and ensure optimal health.


Why buy Medaka ricefish from The Shrimp Farm?

At The Shrimp Farm, we offer premium 3cm breeding-size Medaka ricefish that are carefully selected, health-checked, and shipped with a live arrival guarantee. Our fish are raised and handled with care to ensure you receive healthy, active fish ready to thrive in your aquarium.

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