Kubotai Rasbora (Microdevario kubotai), Tank-Bred

Origin: Tank Bred

The Kubotai Rasboras offered by Aquatic Arts are tank bred and are not collected from the wild. While the fish available for sale are raised in captivity, understanding the natural habitat of Microdevario kubotai helps explain many of the behaviors that make this species such an outstanding addition to planted aquariums.

In nature, Kubotai Rasboras inhabit small streams, forest creeks, floodplain pools, and slow-moving tributaries in parts of Myanmar and Thailand. These waterways are often shaded by dense vegetation, with submerged roots, fallen branches, aquatic plants, and leaf litter creating a complex underwater environment rich in microscopic life.

Kubotai Rasboras naturally spend their lives in schools, moving together through open water while remaining close to vegetation for protection. Their brilliant green coloration helps them communicate within the group, while their synchronized swimming behavior provides safety from predators. This strong schooling instinct remains evident in the aquarium, where larger groups display greater confidence, tighter schooling, and more vibrant coloration.

These habitats are rich in tiny aquatic insects, zooplankton, microorganisms, and biofilm that provide a constant food source. The combination of clean, well-oxygenated water, gentle current, and abundant vegetation has shaped Kubotai Rasboras into active, peaceful fish that thrive in mature planted aquariums.

Today, Kubotai Rasboras are highly valued for their brilliant coloration, peaceful temperament, and ability to integrate into a wide variety of freshwater community aquariums. Providing stable water quality, quality nutrition, and the security of a proper school allows these remarkable nano fish to display their most natural behavior and striking neon green coloration.

Kubotai Rasboras are one of the best fish available for bringing movement and energy to a planted aquarium. While plants, driftwood, stones, and hardscape establish the structure of the aquascape, a healthy school of Kubotai Rasboras provides the motion. Their brilliant neon green coloration seems to shimmer as the school moves through open water, creating an ever-changing display that instantly draws the eye.

One of our favorite ways to showcase Kubotai Rasboras is in a densely planted nature-style aquarium featuring dark substrate, branching driftwood, and layered groups of Pearl Weed, Rotala, Cryptocoryne, Water Sprite, Bucephalandra, and Java Fern. Floating plants such as Frogbit or Red Root Floaters help diffuse overhead lighting while encouraging the fish to display stronger coloration and more confident schooling behavior.

Because Kubotai Rasboras naturally school through the middle of the aquarium, we recommend creating generous open swimming lanes surrounded by dense plant growth. This combination allows the school to remain visible while still providing the security of nearby vegetation. The result is a much more natural display, with the fish constantly weaving in and out of the aquascape rather than remaining hidden.

For hobbyists looking to create a complete freshwater ecosystem, Aquatic Arts Botanical Combo Packs, Aquatic Arts Mixed Fruit Leaf Packs, Aquatic Arts Shrimp Botanical Breeder Packs, and Aquatic Arts Tannin Tea Bags make excellent additions to a Kubotai Rasbora aquarium. These botanicals encourage the development of biofilm and beneficial microorganisms, provide natural grazing surfaces for shrimp and snails, and help create the mature appearance often associated with established Southeast Asian stream habitats.

The finished aquarium becomes a balanced living ecosystem. Shrimp graze across botanicals and driftwood, snails quietly clean the hardscape, plants sway gently in the current, and a brilliant school of Kubotai Rasboras glides through the open water like flashes of emerald green light. Their synchronized swimming brings every part of the aquarium together, transforming a beautiful aquascape into one that feels truly alive.

Kubotai Rasboras are opportunistic omnivores that spend much of their day actively searching for tiny food particles throughout the water column. In their native habitat, they naturally feed on zooplankton, microscopic crustaceans, insect larvae, tiny aquatic insects, biofilm, algae, and other microorganisms found among aquatic vegetation and submerged structure.

Because of their small mouths, Kubotai Rasboras perform best when offered appropriately sized foods. A high-quality micro pellet, nano pellet, or finely crushed flake should serve as the foundation of their daily diet. Foods designed specifically for nano community fish are readily accepted and provide the balanced nutrition necessary for long-term health.

To encourage optimal coloration, body condition, and natural behavior, we recommend regularly supplementing their diet with Baby Brine Shrimp, Moina, Daphnia, Cyclops, Vinegar Eels, microworms, and other appropriately sized frozen or live foods. These protein-rich foods help support healthy growth, immune function, and breeding condition while allowing Kubotai Rasboras to display their natural hunting instincts.

Kubotai Rasboras are active schooling fish that often feed together, quickly responding when food enters the aquarium. Their synchronized feeding behavior is fascinating to observe, as the entire school moves together while capturing suspended food particles throughout the middle of the water column.

A varied diet plays an important role in maintaining the brilliant neon green coloration that makes this species so desirable. Fish receiving a diverse diet of quality prepared foods combined with regular frozen and live food supplements often display more intense coloration, stronger schooling behavior, and improved overall vitality.

Because of their small stomachs and active metabolism, Kubotai Rasboras generally perform best when fed smaller portions once or twice daily rather than large infrequent meals. Feeding only what the school can consume within a few minutes helps maintain excellent water quality while ensuring every fish has access to food.

For hobbyists maintaining planted aquariums, Kubotai Rasboras complement other community fish exceptionally well by feeding primarily in the middle water column. This natural separation allows bottom-dwelling species such as Corydoras and Otocinclus to utilize sinking foods while Kubotai Rasboras efficiently feed on suspended foods above, creating a more balanced and harmonious freshwater ecosystem.

Kubotai Rasboras are exceptionally peaceful community fish that coexist well with a wide variety of nano fish, shrimp, snails, and other gentle freshwater species. Their small adult size, active schooling behavior, and non-aggressive temperament make Kubotai Rasboras one of the best choices for planted aquariums and nature-inspired freshwater ecosystems.

Because Kubotai Rasboras spend most of their time schooling through the middle of the aquarium, they pair especially well with species that utilize different ecological niches. Combining surface, midwater, and bottom-dwelling species creates a more balanced aquarium while allowing each inhabitant to display its natural behavior.

Excellent tank mates include:

• Chili Rasbora (Boraras brigittae) – Nano Schooling Fish

• Emerald Dwarf Rasbora (Celestichthys erythromicron) – Peaceful Nano Community Fish

• Celestial Pearl Danio (Danio margaritatus) – Nano Schooling Fish

• Ember Tetra (Hyphessobrycon amandae) – Peaceful Midwater Schooling Fish

• Least Rasbora (Boraras urophthalmoides) – Tiny Community Fish

• Pygmy Corydoras (Corydoras pygmaeus) – Social Bottom Dweller

• Habrosus Corydoras (Corydoras habrosus) – Nano Bottom Dweller

• Otocinclus Catfish (Otocinclus spp.) – Algae-Grazing Community Fish

• Sparkling Gourami (Trichopsis pumila) – Peaceful Nano Centerpiece Fish

• Amano Shrimp (Caridina multidentata) – Cleanup Crew Member

• Neocaridina Shrimp (Neocaridina davidi) – Freshwater Dwarf Shrimp

• Nerite Snails (Neritina spp.) – Algae-Grazing Invertebrate

Kubotai Rasboras display their best coloration and most natural schooling behavior when maintained in larger groups of their own species. Schools of eight or more fish are noticeably more confident and often remain visible throughout the aquarium rather than hiding among plants.

Avoid housing Kubotai Rasboras with large predatory fish, aggressive cichlids, large barbs, or other species capable of viewing these tiny rasboras as food. Even some otherwise peaceful medium-sized fish may intimidate Kubotai Rasboras due to their diminutive adult size.

When maintained with compatible species, Kubotai Rasboras become one of the highlights of a planted community aquarium. Their synchronized schooling behavior, peaceful nature, and brilliant neon green coloration provide constant movement and visual interest while complementing shrimp, snails, plants, and other nano fish within a thriving freshwater ecosystem.

Adult Shrimp: Excellent Compatibility

Juvenile Shrimp: Usually Safe

Kubotai Rasboras are widely regarded as one of the best nano fish for shrimp aquariums. Their tiny adult size, peaceful disposition, and small mouths make Kubotai Rasboras an excellent companion for established freshwater shrimp colonies and planted community aquariums.

Adult Neocaridina Shrimp, Caridina Shrimp, Amano Shrimp, Bamboo Shrimp, and Vampire Shrimp typically coexist with Kubotai Rasboras without issue. Because Kubotai Rasboras spend most of their time schooling through the middle of the aquarium, they rarely interact with adult shrimp, which generally remain busy grazing on plants, botanicals, driftwood, and hardscape.

Unlike many larger community fish, Kubotai Rasboras present relatively little risk to newly hatched shrimp. While they may occasionally consume the smallest shrimplets if encountered in open water, their tiny mouths greatly limit their ability to prey on juvenile shrimp. In well-planted aquariums with dense mosses and natural cover, shrimp colonies often reproduce successfully alongside Kubotai Rasboras.

For hobbyists looking to maximize shrimplet survival, we recommend incorporating Java Moss, Subwassertang, Guppy Grass, floating plants, Aquatic Arts Botanical Combo Packs, Aquatic Arts Shrimp Botanical Breeder Packs, and Aquatic Arts Mixed Fruit Leaf Packs. These materials create complex hiding places while encouraging the growth of biofilm and beneficial microorganisms that serve as an important food source for young shrimp.

Kubotai Rasboras are one of our favorite choices for freshwater ecosystem aquariums because they allow shrimp, snails, and fish to naturally occupy different areas of the aquarium with very little competition. Their peaceful nature and small size make them ideal companions for hobbyists who want both an active school of fish and a thriving shrimp colony.

Aquatic Arts Shrimp Compatibility Rating: 9.5/10

Excellent Choices:

• Neocaridina Shrimp
• Caridina Shrimp
• Amano Shrimp
• Bamboo Shrimp
• Vampire Shrimp
• Established Freshwater Shrimp Colonies

Use Slight Caution With:

• Newly Hatched Shrimplets in Sparsely Planted Aquariums

For hobbyists seeking one of the most shrimp-compatible schooling fish available, Kubotai Rasboras are among our highest recommendations. Their peaceful temperament, tiny adult size, and natural schooling behavior make them exceptionally well suited for planted aquariums built around shrimp, snails, aquatic plants, and other nano community species.

Breeding Difficulty: Moderate

Reproduction Type: Egg Scatterer

Kubotai Rasboras are rewarding fish to breed, but they are somewhat more challenging than many common community species. While healthy adults may spawn naturally in a mature aquarium, successfully raising the fry typically requires a dedicated breeding setup and careful attention to water quality, food size, and egg protection.

Mature males are generally slimmer and display more intense neon green coloration, particularly when competing for the attention of females. Well-conditioned females become noticeably fuller-bodied as they develop eggs. Spawning most often occurs during the early morning hours and is frequently stimulated by excellent water quality, regular water changes, and a diet rich in live and frozen foods.

Kubotai Rasboras are egg scatterers that release small adhesive eggs among fine-leaved plants, mosses, spawning mops, and other delicate vegetation. Java Moss, Subwassertang, and artificial spawning mops are particularly effective because they provide numerous surfaces for the eggs to adhere to while helping conceal them from hungry adults.

Like many egg-scattering fish, Kubotai Rasboras provide no parental care and will readily consume both their eggs and newly hatched fry if given the opportunity. Hobbyists interested in breeding this species typically use a dedicated breeding aquarium with dense spawning media, marbles, mesh bottoms, or other methods that allow the eggs to fall safely out of reach of the adults.

Eggs generally hatch within 24 to 48 hours depending on water temperature. Newly hatched fry are extremely small and require microscopic foods such as infusoria, paramecium, vinegar eels, commercially prepared liquid fry foods, or other appropriately sized first foods. As the fry grow, they can gradually be transitioned to freshly hatched Baby Brine Shrimp, microworms, and finely powdered prepared foods.

Conditioning adult Kubotai Rasboras with a varied diet of Baby Brine Shrimp, Moina, Daphnia, Cyclops, and other quality live or frozen foods often results in improved spawning frequency, higher egg production, and healthier fry. Excellent water quality and stable aquarium conditions are equally important for successful breeding.

Although Kubotai Rasboras require more effort to breed than livebearers such as guppies, they are an excellent species for hobbyists interested in learning about egg-scattering fish. Successfully raising a new generation of these brilliant neon green nano fish is a rewarding experience and an exciting achievement for dedicated aquarists.

Are Kubotai Rasboras beginner friendly?

Yes. Kubotai Rasboras are excellent beginner fish for hobbyists interested in nano aquariums and planted community tanks. They are hardy, peaceful, and readily adapt to well-maintained freshwater aquariums.

What makes Kubotai Rasboras unique?

Kubotai Rasboras are best known for their brilliant neon green coloration, active schooling behavior, and exceptional compatibility with shrimp and other nano fish.

Are Kubotai Rasboras good for a first aquarium?

Yes. Kubotai Rasboras are easy to care for provided they are kept in appropriate schools and maintained in stable water conditions.

What size aquarium is recommended for Kubotai Rasboras?

A minimum aquarium size of 10 gallons is recommended, although larger aquariums provide additional swimming space and allow larger schools to display more natural behavior.

How many Kubotai Rasboras should be kept together?

Kubotai Rasboras should be maintained in schools of at least eight fish. Larger schools display tighter schooling behavior, improved confidence, and more vibrant coloration.

Do Kubotai Rasboras school or shoal?

Kubotai Rasboras are true schooling fish and display their most natural behavior when maintained in groups of their own species.

Can Kubotai Rasboras be kept alone?

No. A single Kubotai Rasbora will often become stressed and withdrawn. They should always be maintained as part of a school.

What is the temperament of Kubotai Rasboras?

Kubotai Rasboras are exceptionally peaceful and are among the gentlest nano fish available for community aquariums.

What area of the aquarium do Kubotai Rasboras occupy?

Kubotai Rasboras primarily inhabit the middle water column but will utilize open swimming areas throughout the aquarium.

Are Kubotai Rasboras suitable for planted aquariums?

Yes. Kubotai Rasboras are one of our favorite species for planted aquariums. Their neon green coloration contrasts beautifully against lush aquatic plants.

What do Kubotai Rasboras eat?

Kubotai Rasboras are omnivores that readily accept micro pellets, crushed flakes, frozen foods, and live foods sized appropriately for their small mouths.

What foods help improve Kubotai Rasbora coloration?

A varied diet that includes Baby Brine Shrimp, Daphnia, Moina, Cyclops, and quality prepared foods helps maintain their brilliant neon green coloration.

Can Kubotai Rasboras live with shrimp?

Yes. Kubotai Rasboras are considered one of the best schooling fish for freshwater shrimp aquariums.

Are baby shrimp safe with Kubotai Rasboras?

Most shrimplets are generally safe, especially in planted aquariums. While the smallest shrimplets may occasionally be consumed, Kubotai Rasboras pose significantly less risk than most community fish.

Can Kubotai Rasboras live with snails?

Yes. Kubotai Rasboras are excellent companions for Nerite Snails, Mystery Snails, Rabbit Snails, and other peaceful freshwater snails.

What are the best tank mates for Kubotai Rasboras?

Excellent companions include Chili Rasboras, Ember Tetras, Celestial Pearl Danios, Pygmy Corydoras, Otocinclus, Sparkling Gouramis, Amano Shrimp, and Nerite Snails.

Which fish should not be kept with Kubotai Rasboras?

Avoid large cichlids, predatory fish, large barbs, and any species capable of viewing Kubotai Rasboras as food.

Are Kubotai Rasboras easy to breed?

Kubotai Rasboras are moderately difficult to breed. While spawning often occurs naturally, successfully raising the fry usually requires a dedicated breeding aquarium.

Will Kubotai Rasboras breed in a community aquarium?

Spawning may occur, but eggs and newly hatched fry are typically consumed before reaching adulthood.

How long do Kubotai Rasboras live?

With proper care, Kubotai Rasboras commonly live between 3 and 5 years.

Kubotai Rasbora vs Chili Rasbora: What is the difference?

Kubotai Rasboras are larger and display brilliant neon green coloration, while Chili Rasboras are smaller and exhibit vibrant red coloration. Both species are excellent nano community fish.

Kubotai Rasbora vs Emerald Dwarf Rasbora: Which is better?

Both are outstanding nano fish. Kubotai Rasboras are active schooling fish that remain in open water, while Emerald Dwarf Rasboras spend more time exploring plants and lower portions of the aquarium.

Kubotai Rasbora vs Celestial Pearl Danio: What is the difference?

Celestial Pearl Danios display spotted bodies and orange fins, while Kubotai Rasboras are known for their brilliant solid neon green coloration and tighter schooling behavior.

Which nano schooling fish is best for beginners?

Kubotai Rasboras, Ember Tetras, and Chili Rasboras are all excellent beginner-friendly nano schooling fish. Kubotai Rasboras are often preferred for their vibrant coloration and peaceful nature.

Are Kubotai Rasboras safe with Neocaridina Shrimp?

Yes. Kubotai Rasboras are among the best fish for aquariums containing adult Neocaridina Shrimp.

Are Kubotai Rasboras safe with Caridina Shrimp?

Yes. Kubotai Rasboras are an excellent companion for mature Caridina Shrimp colonies.

How do Kubotai Rasboras contribute to an aquarium ecosystem?

Kubotai Rasboras provide constant movement, natural schooling behavior, and brilliant color while complementing shrimp, snails, aquatic plants, and bottom-dwelling fish.

Would Aquatic Arts recommend Kubotai Rasboras for my aquarium?

Absolutely. Kubotai Rasboras are one of our highest recommendations for planted aquariums, nano community tanks, and freshwater ecosystems. Their peaceful temperament, brilliant neon green coloration, and exceptional compatibility make them one of the finest nano fish available.

Does the Aquatic Arts Live Arrival Guarantee apply to Kubotai Rasboras?

Yes. Every Kubotai Rasbora sold by Aquatic Arts is covered by our 100% Live Arrival Guarantee.

How are Kubotai Rasboras shipped by Aquatic Arts?

Kubotai Rasboras are carefully quarantined, observed, and conditioned before shipment to help ensure they arrive healthy and ready to thrive in their new aquarium.

What if I have questions after my Kubotai Rasboras arrive?

Every purchase includes access to the Aquatic Arts support team. Whether you need assistance with acclimation, feeding, compatibility, breeding, aquascaping, or long-term care, we're here to help you succeed.

We stand behind the health and quality of every fish we ship. Each Kubotai Rasbora is carefully quarantined, observed, and conditioned before leaving our facility to help ensure it arrives healthy and ready to thrive in its new aquarium.

Every order is backed by our 100% Live Arrival Guarantee. In the unlikely event that an issue occurs during transit, simply contact our team and we will work quickly to help resolve the situation.

When your fish arrive, we recommend introducing them promptly into a fully cycled aquarium with stable water parameters and peaceful tank mates. Kubotai Rasboras thrive when maintained in schools and provided with clean, well-oxygenated water, quality nutrition, abundant plant cover, and open swimming space where they can display their natural schooling behavior.

In addition to our Live Arrival Guarantee, every purchase includes access to our experienced support team. Whether you have questions about acclimation, feeding, compatibility, breeding, aquascaping, or general husbandry, we are here to help you get the most from your Kubotai Rasbora aquarium.

For assistance with your order or livestock care questions, please contact us at info@aquaticarts.com.

For complete details about our Live Arrival Guarantee, please visit:

https://aquaticarts.com/policies/refund-policy

Best Fishes,

The Aquatic Arts Team