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Neon Green Rasboras (Microdevario kubotai)

Neon Green Rasboras (Microdevario kubotai)

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Description
Freshwater Fish

Neon Green Rasbora

A tiny schooling fish with a vivid neon lime-green body that fluoresces under aquarium lighting. One of the few freshwater fish whose colour intensity genuinely rivals marine species, and an outstanding companion for shrimp.

Neon Lime-Green Body Microdevario kubotai Under 1 Inch pH 6.0–7.5 School of 8 or More Outstanding Shrimp Companion

Neon Green Rasboras (Microdevario kubotai), also known as Kubotai Rasboras and Green Rasboras, are a tiny schooling fish from the clear forest streams and shallow tributaries of western Thailand and Myanmar. Adults reach approximately 2cm in length, making them one of the smallest schooling fish in the hobby, and their defining characteristic is a vivid neon lime-green colouration that fluoresces intensely under quality aquarium lighting. The colour intensity is genuinely remarkable for a freshwater species, rivalling many marine fish, and in a school of 10 or more moving through a planted tank the collective green shimmer creates one of the most striking visual effects achievable in a nano aquarium. They are peaceful, tight-schooling, and exceptionally compatible with shrimp. Note that the invoice designation Rasbora kubotai is an older name for this species; the current accepted scientific name is Microdevario kubotai. Keep in schools of 8 or more in a densely planted tank with dark substrate for the most vivid colour expression.

6.0–7.5pH
2–12GH (dGH)
72–79°FTemperature
0.8 inMax Size

Neon Green That Actually Glows

Vivid neon lime-green body with a fluorescent quality under aquarium LEDs. The green colouration of M. kubotai is unusual among freshwater fish in both hue and intensity. Under quality aquarium lighting the green appears to fluoresce rather than simply reflect, producing a glow effect that is genuinely rare in freshwater species. A vivid neon green-yellow lateral stripe runs along the body and is the most intensely coloured element. Some specimens display a subtle blue shimmer alongside the green under certain lighting conditions. Dark substrate dramatically enhances the fluorescent colouration. This is the single most impactful setup decision for displaying Neon Green Rasboras. Against dark substrate such as aquasoil or black sand the neon green reads at maximum intensity. Against pale substrate the colour washes out significantly and the fluorescent quality is largely lost. Red aquarium plants provide an additional complementary contrast that makes the green appear even more vivid. Tight schooling behaviour -- keep in groups of 8 minimum, 15 or more preferred. Neon Green Rasboras school more tightly than most nano fish, moving as a coordinated group through the upper and middle water column. In groups below 8 they become nervous, hide frequently, and show washed-out colour. A school of 15 or more produces the dense green shimmer effect the species is known for and gives the fish the confidence to occupy open water rather than sheltering in plant cover. Males more intensely coloured than females, particularly when competing for attention. Mature males are slimmer and display noticeably more intense neon green colouration, especially during competitive displaying. Well-conditioned females become fuller-bodied as they develop eggs. A mixed-sex group produces the most active displaying and the best sustained colour from the males. Requires stable, well-maintained water -- not the hardiest nano fish. Neon Green Rasboras are less forgiving of poor water quality and parameter swings than hardier species like White Cloud Mountain Minnows. They require a mature, cycled, stable tank with consistent small partial water changes. This is not a fish for a new or cycling aquarium. In stable conditions they are straightforward to keep long-term. Moderate flow and good oxygenation, with floating plants to diffuse light. They come from clear flowing streams and appreciate moderate water movement for oxygenation, though not harsh current. Floating plants diffuse overhead lighting and give the fish confidence to occupy open water. Dense stem plants and mosses around the perimeter with open central swimming space is the ideal layout.

Exceptional Shrimp Companion

Tiny mouth -- adult Neocaridina and Caridina shrimp are completely safe. At under an inch with a proportionally tiny mouth, M. kubotai poses no threat to adult shrimp of any species. Only the very smallest newly hatched shrimplets are at any risk, and in a densely planted tank with moss cover shrimplet survival rates alongside Neon Green Rasboras are high. They are specifically noted for exceptional compatibility with shrimp and other nano species. Upper and mid-water schooling means minimal interaction with substrate-level shrimp. Neon Green Rasboras occupy the upper portion of the water column and school in open water. Shrimp work the substrate, hardscape, and plant surfaces below. The vertical separation between the two species means they essentially share the tank without competing for space or resources at any point. Parameter range overlaps well with both Neocaridina and soft-water Caridina setups. At pH 6.0 to 7.5 and moderate hardness, Neon Green Rasboras sit comfortably within the Neocaridina range and at the upper end of the Caridina range. A soft-water Neocaridina tank at pH 7.0 is ideal for both species simultaneously. Pairs exceptionally well with Chili Rasboras for a red and green display. The vivid green of M. kubotai and the scarlet red of Chili Rasboras are visually opposite and create a dazzling effect when both species are schooled in the same densely planted tank. Both share similar care requirements, similar size, and identical shrimp compatibility.
Keeper's Note

A school of 15 Neon Green Rasboras over dark aquasoil with red stem plants in the background and a colony of Fire Red Cherry shrimp working the substrate below is one of the most colour-saturated nano tank displays achievable in freshwater. The neon green of the fish against the dark substrate, the red plants providing complementary contrast, and the red shrimp echoing the plant colour at the substrate level create a display where every element reinforces every other. Give the tank three months to mature before adding the Rasboras, keep the water stable, and this is a setup that only improves over time.

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Policies & Disclaimers
Before you order · Fish

Policies & Disclaimers

What to expect from your fish, overnight shipping requirements, and what to do when your order arrives.

Overnight shipping required for guarantee coverage

Choose overnight (next day air) shipping for fish. Our Live Arrival Guarantee does not cover fish shipped by 2-day, standard expedited or ground service. Overnight shipping is a condition of coverage; the claim deadline and documentation requirements below also apply.

Size & representative photos

Fish size and appearance vary by species, age and individual. Refer to the listing and selected option for any stated purchase size. Adult or maximum sizes in care information describe growth potential, not a guaranteed size on arrival. Photos represent the species or variety rather than the exact fish you will receive.

Color & settling in

Color and markings can vary between individuals and with age, sex, lighting and aquarium conditions. Fish may look paler after shipping. Follow the species-specific acclimation and care guidance and provide stable water conditions. If a fish arrives dead or visibly distressed, document its condition and contact us promptly rather than waiting beyond the claim window.

Species needs & compatibility

Check the specific listing for adult size, temperature, water requirements, diet and recommended group size. A small shipping size does not mean a fish will stay small. Choose suitable tankmates and allow for adult growth; a community-fish label is not a guarantee of compatibility with every fish or invertebrate.

Pack contents & selection

The selected quantity identifies the number of fish ordered. A group does not by itself promise a breeding pair or particular sex ratio. Any explicit sex or selection offered in the listing applies to that selected option.

Juvenile appearance, growth & sex differences

Young fish may have less intense coloration, different proportions or less-developed fins than mature examples in photographs. Species, age, sex and social conditions can affect their appearance. Adult-size figures describe growth potential, not the size guaranteed in the shipping bag.

Plan housing around adult needs. A small pleco, for example, still needs the space and diet appropriate to its identified species as it grows. Use the listing’s stated species and selected option rather than a photograph alone to judge what you are buying.

Unless a listing explicitly offers a sex-selected option, a quantity pack is not a specified sex ratio or breeding pair. Where an explicit selection is offered, that selected option applies.

Shipping appearance versus concerning distress

Paler colors, hiding and a reduced initial appetite can occur after transport. These observations alone do not establish a covered loss. They also should not be used to dismiss a fish that appears to be struggling.

Photograph or record visible concerns such as loss of balance, persistent labored breathing, an obvious wound or a fish that appears dead while it is still in the original packaging. Include the label and packaging and contact us promptly within the two-hour reporting window. Report observations rather than guessing a diagnosis.

Do not wait for color or activity to improve before reporting an arrival concern. Coverage and resolution follow the full guarantee; this guidance does not add a new health guarantee or extend the claim window.

Schools, tankmates & adult housing

Schooling fish should be housed with an appropriate group of their own species. The quantity options offered for purchase are not a statement that each option is a suitable permanent school size. Check the listing’s group-size guidance and the aquarium’s capacity.

Peaceful fish can still eat animals small enough to fit in their mouths, including shrimplets. Consider adult size, feeding behavior, water requirements and available shelter when choosing tankmates. No general community label guarantees compatibility in every aquarium.

Bottom-dwelling fish need food that reaches them; they should not be expected to live only on leftovers. Provide the species-appropriate diet and observe whether quieter fish are being outcompeted.

Acclimation & quarantine

Have a stable, cycled aquarium or suitable quarantine setup ready before the shipment arrives. Follow the acclimation instructions appropriate to shipped fish and the species; do not assume a single timed method is suitable for every shipment or bag condition.

Document arrival concerns before transfer under the guarantee’s instructions. Avoid adding shipping water to the established aquarium, and minimize unnecessary handling and disturbance during introduction.

Separate observation of new fish can help protect an established collection and make feeding and behavior easier to monitor. Quarantine is care advice here, not a newly added condition of claim eligibility. Do not medicate automatically without considering the species and the actual concern.

Bonus animals & your paid count

When inventory allows, our policy provides one bonus animal for every five ordered of the same species. Bonuses are discretionary and are not separately covered for refund or replacement. They count toward the total arriving alive when assessing whether your paid quantity was fulfilled.

For example, if you order 10 fish and receive 12, receiving 11 alive fulfills the paid count. If fewer than 10 arrive alive, the shortfall is assessed under the guarantee. Expected bonuses that were not included are not a paid-item shortage.

Checking quantities & reporting a short count

Check the actual animals received against your paid order quantity. For a suspected short count, the full policy calls for a clear counting photo showing all animals, the empty bag and the shipping label before they are introduced into an aquarium. Follow its counting instructions and contact us if you cannot document the count clearly.

Verified miscount claims are resolved with a refund for the missing paid animals under the current policy. A count made after release can be unreliable when animals hide among plants or hardscape.

Before opening: photographs & your first report

Use the email address on the original order and include all arrival concerns in the initial message to support@superiorshrimpaquatics.com within two hours of the carrier’s recorded delivery time. Photograph the sealed bag, visible and countable animals, shipping label, box and packing materials.

If the bag is leaking or damaged, photograph the leak or damage and wet packing before opening. Keep the original photographs and packaging. For cloudy water that prevents counting, take the original cloudy-water photo first and follow the full policy’s specific additional clear-container documentation instructions.

The guarantee contains restrictions on opening bags, acclimation and transfers. Review those instructions before taking action so the evidence needed to assess the claim is preserved.

Arrival problem? Document it promptly.

Email support@superiorshrimpaquatics.com within two hours of the carrier’s recorded delivery time, using the email address on your order.

  • Photograph the original sealed bag with the animals visible and countable.
  • Include the shipping label, outer box and packing materials.
  • Document any bag damage or leakage before opening.
  • Report all arrival losses in your initial message.

Read the full guarantee for photo requirements, cloudy-water documentation and claim eligibility before opening or transferring animals. Approved claims are resolved under the options and conditions stated there.

Shipping & coverage limits

Fish must ship by overnight (next day air) service to qualify for the Live Arrival Guarantee. Fish shipped by 2-day, standard expedited or ground service are not covered. Selecting a non-overnight method waives guarantee coverage for the fish in that order.

The guarantee applies to the first delivery attempt. Redirection, pickup holds and carrier delays can affect eligibility under the full policy. Any product-specific coverage restrictions stated in a listing also apply.

Hitchhikers & quarantine

Live aquatic products can carry tiny hitchhikers or eggs despite inspection. Pest-free arrival is not guaranteed. We recommend quarantining new arrivals before introducing them into an established aquarium.

Returns

Care guidance in this tab does not create additional guarantee requirements or exclusions. Please read the full policies for complete eligibility, documentation, resolution and return requirements.

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