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Maximum size : 2 cm

Neon Green Rasbora - Microdevario kubotai : Complete Fish Profile & Care Guide

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The captivating Neon Green Rasboras (Microdevario kubotai) are a remarkable species that can add a burst of colour and activity to any well-planted or nano aquarium. In addition, these peaceful fish are relatively hardy, making them an excellent addition to any aquarist's collection.

A large school of Neon Green Rasboras is a sight to behold, filling the upper area of the aquarium with its vibrant colours and lively activity. Maintaining these fish in groups of 8 to 10 individuals is recommended, as they are a schooling species in the wild. Keeping them in significant numbers will not only make them less nervous but also result in a more natural and impressive display. Additionally, males will showcase their best colours as they compete for female attention, creating an exciting spectacle for any observer.

When housing Neon Green Rasboras, it's best to either set up a species-only tank or include other small, peaceful fish such as small Tetras, Danios, small Rasbora species, and Corydoras Catfish. While these fish may not always be suitable for a typical community aquarium due to their small size and timid nature, larger groups, plenty of coverage, and peaceful tankmates can give them the confidence they need to thrive.

To create the ideal habitat for Neon Green Rasboras, it's best to design the aquarium with areas of dense planting, including shady bogwood pieces. These fish would also appreciate the addition of floating plants to help diffuse the light. The aquarium needs to have moderate water movement to encourage good oxygenation levels, but the current should not be too harsh. Regular small partial water changes are also crucial to maintaining a healthy environment for these fish.

Neon Green Rasboras have a striking greyish-olive body accentuated by an iridescent greenish-yellow hue. Additionally, they possess a prominent metallic yellowish-gold lateral stripe, and their dorsal and anal fins are translucent. These remarkable fish are sure to capture the attention and admiration of any observer.

Neon Green Rasbora Photos

Sexual Dimorphism

Distinguishing between male and female Neon Green Rasboras is relatively straightforward. Fully mature males exhibit more vibrant colouring and a more compact body shape than females. In contrast, females are typically slightly larger in size and take on a gravid appearance when ready to reproduce.

Quick Facts

Scientific NameMicrodevario kubotai
Year Described1999
Other NamesYellow Neon Rasbora, Kubotas Microrasbora
OriginsMyanmar Thailand
Max Size2 cm
Aquarium LevelMiddle - Top
DifficultyBeginner - Intermediate
Best kept asGroups 8+
LifespanUp to 8 Years

Water Parameters

Water TypeFreshwater
PH5.5 - 7.5
GH4 - 8
TDS18 - 179
72 - 82
22 - 27

Natural Habitat

Neon Green Rasboras are a stunning fish species that can be found in the Ataran River Basin, a tributary within the Salween drainage in southern Myanmar, as well as the Ranong and Phang Nga provinces on the northwestern slope of the peninsular in Thailand, located in Southeast Asia. These Rasboras have also been documented in the Suriya River basin in Thailand.

In the wild, Neon Green Rasboras prefer to inhabit calm to moderately flowing areas of well-oxygenated headwaters and minor tributaries with clear water. These habitats often feature submerged driftwood, aquatic vegetation, and roots of riparian vegetation. The substrate typically consists of gravel, sand, rocks, stones, and patches of leaf litter. With such specific requirements for their environment, Neon Green Rasboras are a true natural marvel that requires careful attention to thrive in a captive aquarium setting.


In a densely planted aquarium with large groups of well-conditioned Neon Green Rasboras, spawnings should occur regularly, with eggs being scattered over the vegetation and decor. While the adults may see the eggs and fry as a source of food, some may survive to adulthood if there is ample plant cover. However, a more controlled approach is necessary for those seeking to raise a larger number of fry.

Setting up a separate breeding tank with plenty of plants or spawning mops is crucial for breeding Neon Green Rasboras. Once the breeding tank is established, a pair of well-conditioned adults should be carefully placed into it. Following spawning, which typically occurs 2 or 3 days later, the adults must be promptly removed and put back into their original aquarium to prevent them from consuming any eggs. The incubation period is temperature-dependent but generally lasts around 72 hours, with the young becoming free-swimming 3 to 4 days later.

To raise the fry successfully, it's recommended to first feed them infusoria-type foods before gradually moving on to baby brine shrimp, microworms, or crushed flake food once the fry is large enough to accept them. Then, with proper care and attention, a healthy brood of Neon Green Rasboras can be successfully raised in the breeding tank, adding to the beauty and vibrancy of any aquarium.


Diet & feeding

Neon Green Rasboras are generally not considered picky eaters and will readily accept high-quality dried food such as flakes, pellets, and granules. However, to provide a well-rounded diet, it's recommended to include frozen or live food such as brine shrimp, bloodworms, daphnia, and insect larvae. It's important to note that these fish have very small mouths, so any food provided must be of appropriate size.

Neon Green Rasboras also appreciates occasional offerings of blanched vegetables such as lettuce, zucchini, or kale. By incorporating a varied diet into their feeding regime, these small but stunning fish will maintain their vibrancy and remain healthy for years to come.


Neon Green Rasbora (Microdevario kubotai) Aquarium Fish Species Profile & Care Guide Thumbnail

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