Green Kubotai Rasbora – A Glowing Gem for Planted Aquariums

Looking for a splash of neon green movement in your aquascape? The Green Kubotai Rasbora (Microdevario kubotai) is a truly unique nano fish that adds life, color, and harmony to any freshwater tank. With its metallic green hue and schooling behavior, this tiny species is a showstopper in planted tanks and nano setups alike.

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? Species Overview

• Common Names: Green Kubotai Rasbora, Neon Green Rasbora

• Scientific Name: Microdevario kubotai

• Origin: Southeast Asia – Thailand and Myanmar

• Size: 0.75–1 inch (2–2.5 cm)

• Lifespan: 3–5 years

• Temperament: Peaceful and social

• Diet: Omnivore

• Tank Level: Mid to upper levels

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✨ Vivid Color in a Tiny Package

What sets the Green Kubotai Rasbora apart is its shimmering, almost electric green body. This coloration becomes even more vibrant in mature fish under proper lighting—especially in tanks with dark substrates and dense plant cover.

Whether kept in a species-only tank or in a larger community, their constant motion and reflective color create a stunning, lively visual effect.

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? Behavior & Tank Mates

These rasboras are highly social shoaling fish and thrive in groups of at least 8–10 individuals. In large enough numbers, they display natural schooling behavior, which adds a mesmerizing dynamic to planted tanks.

Compatible Tank Mates:

• Chili Rasboras

• Ember Tetras

• Clown Killifish

• Corydoras

• Dwarf shrimp (Neocaridina and Caridina)

• Otocinclus

Avoid housing them with larger or aggressive species that may see them as food.

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? Ideal Tank Setup

• Tank Size: 10 gallons and up (larger if mixing with other species)

• Substrate: Dark sand or fine gravel to enhance color contrast

• Decor: Heavily planted with floating plants, driftwood, and hiding spots

• Water Parameters:

  • Temperature: 72–80°F

  • pH: 6.0–7.5

  • Soft to moderately hard water

• Filtration: Gentle flow—ideal for mimicking stream habitats

• Lighting: Moderate to highlight their iridescence

Floating plants can help diffuse light and make these rasboras feel more secure, encouraging better coloration and activity.

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?️ Feeding

Despite their size, Green Kubotai Rasboras are enthusiastic eaters and will readily accept a variety of small foods.

Recommended Foods:

• Micro pellets

• Crushed flakes

• Baby brine shrimp

• Daphnia

• Cyclops

• Microworms

Feed small portions 1–2 times daily. A high-protein diet will keep their color vibrant and their behavior active.

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? Breeding Behavior

Breeding Green Kubotai Rasboras is possible in a well-planted tank with fine-leaved plants or spawning mops. They are egg scatterers and do not provide parental care, so it’s best to either separate adults after spawning or collect the eggs.

Fry are very tiny and will need infusoria or powdered fry food before graduating to baby brine shrimp.

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✅ Why Choose the Green Kubotai Rasbora?

✔ Electric green coloration unlike any other nano fish
✔ Peaceful nature—great for community tanks
✔ Active schooling behavior
✔ Perfect for planted and aquascaped aquariums