Green 'Kubotai' Rasbora

Green Kubotai Rasbora Care Guide

Common Name: Green Kubotai Rasbora
Scientific Name: Microdevario kubotai
Origin: Thailand and Myanmar
Size: 2.5–3.5 cm
Lifespan: 3–5 years
Temperament: Peaceful, schooling fish
Difficulty: Easy to Moderate

✅ Tank Requirements

• Minimum Tank Size: 40 liters (for a group)

• Temperature: 22–26°C

• pH Level: 6.0–7.5

• Water Hardness: Soft to moderately hard (2–12 dGH)

• Lighting: Moderate (brings out their bright green color)

• Substrate: Dark-colored substrate preferred

Provide a planted aquarium with hiding spots and open swimming space. Floating plants help diffuse light, which reduces stress and enhances their coloration.

️ Diet

Green Kubotai Rasboras are micro-predators and do well on a varied diet:

• High-quality micro-pellets

• Crushed tropical flakes

• Live or frozen baby brine shrimp, daphnia, or microworms

Feed in small amounts once or twice daily to prevent overfeeding.

Behavior and Tank Mates

These rasboras are peaceful schooling fish. Always keep them in groups of at least 6, though 10 or more is ideal for more natural, confident behavior.

Compatible tank mates include:

• Other peaceful nano fish (like ember tetras or chili rasboras)

• Small Corydoras species (e.g., pygmy corys)

• Otocinclus catfish

• Freshwater shrimp (note: they may eat baby shrimp)

Avoid larger or aggressive fish that may harass or eat them.

Breeding

Breeding is possible with the right setup:

• Feed high-protein live foods to condition them

• Provide fine-leaved plants or spawning mops for egg laying

• They scatter eggs and may eat them, so remove adults after spawning

• Fry can be raised on infusoria or powdered fry food

Interesting Fact

Even though they appear neon green, Green Kubotai Rasboras don’t have any actual green pigment. Their shimmering color is caused by light bouncing off microscopic guanine crystals in their skin—creating an optical illusion of vibrant green. It's a natural form of iridescence!