All fish / Danionidae

Neon Green Rasbora

Microdevario kubotai

Also known as kubotai rasbora, green neon rasbora, emerald dwarf rasbora, yellow neon rasbora, microrasbora kubotai, rasbora kubotai, boraras kubotai, neon green microrasbora, ซิวเขียว, ラスボラ・クボタイ, グリーンネオンラスボラ, 绿光波鱼

This tiny, slim fish has a translucent body that glows a bright lime or emerald green under good light, with a thin dark line along the flank. It is popular for planted nano tanks, where a large shoal moves together in open water and shows off its colour against dark plants.

Care at a glance

Care level

Easy

Temperament

Peaceful

Adult size

2 cm

Temperature

22 to 27 °C

pH

6 to 7.5

Smallest tank

40 litres

Keep as

Shoal of 10 or more

Diet

Omnivore: small live and frozen foods such as daphnia, artemia nauplii and cyclops, plus fine dry flakes and micro pellets

Swims

Middle of the tank

Lifespan

3 to 5 years

Water

Freshwater

Wild range

Thailand and Myanmar (Ataran and nearby river basins)

Breeding

It scatters eggs among fine-leaved plants or moss and gives no parental care, so adults will eat eggs and fry. Breeding is fairly easy in a dense, mature planted tank or a separate spawning tank, but the very small fry need infusoria or similar first foods.

Good to know

Small and timid, it should only be kept with other tiny peaceful fish, as larger tankmates will bully or eat it. It was formerly sold under Microrasbora and is sometimes mixed up with other green nano rasboras.