{"product_id":"galaxy-harlequin-phoenix-glowlight-brilliant-rasbora","title":"Brilliant Rasbora (Least Rasbora) - UK","description":"\u003cp\u003eThe \u003cstrong\u003eBrilliant Rasbora\u003c\/strong\u003e, better known in the hobby as the \u003cstrong\u003eLeast Rasbora\u003c\/strong\u003e or \u003cstrong\u003eExclamation Point Rasbora\u003c\/strong\u003e, is one of the most rewarding tiny shoaling fish you can keep in a planted nano aquarium. \u003cem\u003eRasbora urophthalmoides\u003c\/em\u003e stays at around 3 cm, shows a distinctive dark body mark that looks like an exclamation point, and brings constant movement to the middle levels of the tank without the boisterous behaviour of larger cyprinids. For aquarists searching for \u003cstrong\u003emicro fish UK\u003c\/strong\u003e options, \u003cstrong\u003efreshwater nano fish UK\u003c\/strong\u003e favourites, or a \u003cstrong\u003etiny peaceful nano fish UK\u003c\/strong\u003e species that works in a carefully planned community, this fish deserves serious attention. It is peaceful, social, and long enough lived to become a real feature species, with a \u003cstrong\u003eleast rasbora lifespan\u003c\/strong\u003e of around 3 years under stable care. See our detailed photos showing the slim body shape, bright eye, and signature tail spot in the product image \u003cstrong\u003ebrilliant-rasbora.webp\u003c\/strong\u003e. If you want an \u003cstrong\u003eactive nano fish for planted tank\u003c\/strong\u003e layouts, a \u003cstrong\u003emicro fish for planted nano tank\u003c\/strong\u003e, or simply one of the \u003cstrong\u003ebest small rasbora for nano tank\u003c\/strong\u003e setups, the Brilliant Rasbora offers colour, movement, and easy community compatibility in a very small footprint.\u003c\/p\u003e\n\n\u003cdiv class=\"info-box\"\u003e\n  \u003ch4\u003e🔹 Quick Facts\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eScientific Name:\u003c\/strong\u003e \u003cem\u003eRasbora urophthalmoides\u003c\/em\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCare Level:\u003c\/strong\u003e Easy to moderate\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMin Tank Size:\u003c\/strong\u003e 20 litres (about 4.4 gallons)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTemperature:\u003c\/strong\u003e 23-28°C (73-82°F)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003epH Range:\u003c\/strong\u003e 5.0-7.0\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLifespan:\u003c\/strong\u003e Up to 3 years\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTemperament:\u003c\/strong\u003e Peaceful, schooling\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDiet:\u003c\/strong\u003e Omnivore; micro pellets, crushed flake, baby brine shrimp, daphnia\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"species-profile\"\u003e\n  \u003ch3\u003eClassification\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOrder:\u003c\/strong\u003e Cypriniformes\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFamily:\u003c\/strong\u003e Cyprinidae\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGenus:\u003c\/strong\u003e Rasbora\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cem\u003eRasbora urophthalmoides\u003c\/em\u003e belongs to the same broad family as danios, barbs, and many other small Asian schooling fish. In the aquarium hobby it sits among the true micro-rasbora style species prized for planted tanks, blackwater layouts, and gentle community aquariums. Although hobbyists often compare it with Boraras species, this fish is a true rasbora and has its own look, behaviour, and schooling style.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"origin\"\u003eWhere Do Brilliant Rasboras Come From? Natural Habitat Explained\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eexclamation point rasbora habitat\u003c\/strong\u003e is found across parts of Southeast Asia, especially Thailand, Malaysia, and Indonesia. In the wild, \u003cem\u003eRasbora urophthalmoides\u003c\/em\u003e is usually associated with slow-moving waters, flooded margins, drainage ditches, shallow pools, and vegetated streams where leaf litter, roots, and fine plants provide cover. These are not open-river fish in the way that larger species such as \u003ca href=\"\/products\/tropical-fish-uk\"\u003eRasbora trilineata\u003c\/a\u003e can be. Instead, they thrive in calmer, softer, often tannin-stained water with lots of visual structure.\u003c\/p\u003e\n\u003cp\u003eThis natural setting explains why the species does so well as an \u003cstrong\u003eexclamation point rasbora for planted aquarium\u003c\/strong\u003e displays. In nature, they spend much of their time moving in loose groups through stems and marginal plants, picking at tiny invertebrates, biofilm, and suspended food particles. That makes them an ideal choice if you want the \u003cstrong\u003ebest micro rasbora for small aquarium\u003c\/strong\u003e projects or a subtle species for a blackwater-inspired nano aquascape.\u003c\/p\u003e\n\u003cp\u003eWater chemistry in these habitats is usually soft and mildly acidic. That is why \u003cstrong\u003eRasbora urophthalmoides water hardness\u003c\/strong\u003e matters in captivity. While tank-bred fish are adaptable, they show their best colour and calmest behaviour in softer water. Keepers often notice stronger shoaling and cleaner body markings when the tank includes driftwood, floating plants, and shaded areas. If you like the look of a \u003cstrong\u003ephoenix rasbora\u003c\/strong\u003e, \u003cstrong\u003eemerald eye rasbora\u003c\/strong\u003e, or \u003cstrong\u003eemerald dwarf rasbora\u003c\/strong\u003e biotope, the Least Rasbora fits the same general aesthetic while being especially easy to place in a peaceful setup.\u003c\/p\u003e\n\u003cp\u003eBecause they are tiny and non-aggressive, they are vulnerable to predation in the wild and rely on numbers for security. That is why a proper school is so important in the aquarium. Hobbyists who keep them in sparse, brightly lit tanks often miss the species’ real charm. In a shaded planted setup, they become one of the most attractive \u003cstrong\u003enano fish UK\u003c\/strong\u003e choices available.\u003c\/p\u003e\n\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003e💡 Expert Tip\u003c\/h4\u003e\n  \u003cp\u003eMimicking the natural habitat with dark substrate, fine-leaved plants, floating cover, and gentle flow improves colour, reduces skittishness, and encourages tighter schooling. It also makes the exclamation-mark flank pattern stand out much more clearly.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"tank-setup\"\u003eHow Do You Set Up the Perfect Tank for Brilliant Rasboras?\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eleast rasbora tank setup\u003c\/strong\u003e is simple when you focus on scale. These fish are tiny, but they are active and social, so the goal is not just a small tank, but a well-structured one. The accepted \u003cstrong\u003eleast rasbora minimum tank size\u003c\/strong\u003e is 20 litres, and that matches the practical \u003cstrong\u003ebrilliant rasbora tank size\u003c\/strong\u003e for a starter group. However, for better schooling behaviour and easier water stability, a 30-45 litre aquarium is a much better long-term option. If you are planning a heavily planted nano display, this species is one of the best choices for \u003cstrong\u003eleast rasbora for nano tank\u003c\/strong\u003e layouts.\u003c\/p\u003e\n\n\u003ch3\u003eTank Size Requirements\u003c\/h3\u003e\n\u003cp\u003eA 20-litre aquarium can work for a carefully maintained group, but the \u003cstrong\u003eleast rasbora minimum group size\u003c\/strong\u003e should still be respected. These fish are not solitary. A \u003cstrong\u003eleast rasbora school of 6\u003c\/strong\u003e is often sold as a starter quantity, but in practice a group of 10 or more gives much better behaviour, colour, and confidence. A larger group also creates the classic \u003cstrong\u003ebrilliant rasbora school\u003c\/strong\u003e effect many aquarists want. If you are choosing between species for a small display, this is one reason the Least Rasbora is often called the \u003cstrong\u003ebest micro rasbora for small aquarium\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWater Parameters\u003c\/h3\u003e\n\u003cp\u003eThe ideal \u003cstrong\u003eleast rasbora water parameters\u003c\/strong\u003e are stable rather than extreme. Aim for a \u003cstrong\u003eleast rasbora temperature\u003c\/strong\u003e of 23-28°C, with a preferred \u003cstrong\u003eleast rasbora temperature range\u003c\/strong\u003e around 24-26°C for everyday care. The recommended \u003cstrong\u003ebrilliant rasbora temperature\u003c\/strong\u003e overlaps perfectly with most peaceful tropical nano communities. For acidity, the \u003cstrong\u003eleast rasbora pH range\u003c\/strong\u003e is 5.0-7.0, with slightly acidic water often producing the best colour. In terms of hardness, \u003cstrong\u003eRasbora urophthalmoides water hardness\u003c\/strong\u003e should ideally stay between 2 and 10 dGH.\u003c\/p\u003e\n\n\u003cdiv class=\"spec-grid\"\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n    \u003cdiv class=\"spec-value\"\u003e23-28°C\u003c\/div\u003e\n    \u003cdiv class=\"spec-label\"\u003eTemperature\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n    \u003cdiv class=\"spec-value\"\u003e5.0-7.0\u003c\/div\u003e\n    \u003cdiv class=\"spec-label\"\u003epH Range\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n    \u003cdiv class=\"spec-value\"\u003e2-10 dGH\u003c\/div\u003e\n    \u003cdiv class=\"spec-label\"\u003eHardness\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n    \u003cdiv class=\"spec-value\"\u003e20 L+\u003c\/div\u003e\n    \u003cdiv class=\"spec-label\"\u003eMinimum Tank\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eFiltration and Flow\u003c\/h3\u003e\n\u003cp\u003eUse gentle filtration. A sponge filter or a small adjustable internal filter is ideal because these fish come from calmer water and can be stressed by strong current. Fine mechanical filtration helps keep food particles from fouling the water, but avoid turning the tank into a high-flow stream setup. If you are also keeping shrimp, a shrimp-safe sponge intake is strongly recommended.\u003c\/p\u003e\n\n\u003ch3\u003eSubstrate, Plants, and Decor\u003c\/h3\u003e\n\u003cp\u003eDark sand or fine gravel works best. It reduces reflected glare and helps the fish feel secure. For planting, think in layers: low mosses, mid-height stems, and floating cover. A tank with Java moss, Cryptocoryne, Limnophila, Salvinia, and bits of wood creates ideal sight breaks. This species is a standout \u003cstrong\u003eactive nano fish for planted tank\u003c\/strong\u003e displays because it uses the whole midwater zone without uprooting plants or damaging delicate leaves.\u003c\/p\u003e\n\u003cp\u003eFor a broader community, you can combine them with other small rasboras such as \u003ca href=\"\/products\/tropical-fish-uk\"\u003eRed-Tailed Rasboras - Rasbora borapetensis\u003c\/a\u003e only in larger aquariums, though the Least Rasbora is usually best with similarly tiny fish. If you are building a peaceful Asian-style nano setup, browse our wider \u003ca href=\"\/products\/tropical-fish-uk\"\u003erasbora UK collection\u003c\/a\u003e for compatible species ideas.\u003c\/p\u003e\n\n\u003ch3\u003eLighting\u003c\/h3\u003e\n\u003cp\u003eModerate lighting is ideal. Bright light is fine if broken up with floating plants. Too much open brightness can wash out colour and make the fish nervous. In shaded planted tanks, their body mark appears sharper and the fins often show warmer tones.\u003c\/p\u003e\n\n\u003cdiv class=\"info-box\"\u003e\n  \u003ch4\u003eQuick Setup Checklist\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eChoose 20 litres minimum, 30-45 litres preferred for a proper school\u003c\/li\u003e\n    \u003cli\u003eKeep 10+ fish for natural behaviour\u003c\/li\u003e\n    \u003cli\u003eMaintain 23-28°C with stable heating\u003c\/li\u003e\n    \u003cli\u003eUse soft to moderately soft water and pH 5.0-7.0\u003c\/li\u003e\n    \u003cli\u003eAdd dark substrate, wood, and dense planting\u003c\/li\u003e\n    \u003cli\u003eUse gentle filtration with low current\u003c\/li\u003e\n    \u003cli\u003eInclude floating plants for shade and security\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003e💡 Pro Tip\u003c\/h4\u003e\n  \u003cp\u003eAlways cycle the aquarium for 4-6 weeks before adding a Least Micro Rasbora group. Stable biological filtration matters far more than tank size alone when keeping delicate-looking micro fish.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"feeding\"\u003eWhat Do Brilliant Rasboras Eat? Complete Feeding Guide\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eleast rasbora diet\u003c\/strong\u003e is omnivorous and based on very small foods. In the wild they pick at micro-crustaceans, insect larvae, and tiny organic particles. In the aquarium, successful \u003cstrong\u003eleast rasbora feeding\u003c\/strong\u003e means offering foods they can actually swallow. Standard large flakes are often too coarse unless crushed very finely. The best staple foods are quality micro pellets, powdered or crushed tropical flake, and small frozen foods.\u003c\/p\u003e\n\u003cp\u003eBecause this is such a small species, many keepers underestimate how important food size is. A fish can be hungry in a full tank if every item is just slightly too large. This is one reason the \u003cstrong\u003ebrilliant rasbora fish\u003c\/strong\u003e sometimes gets labelled difficult by beginners when the real issue is unsuitable food texture. For \u003cstrong\u003etropical nano fish UK\u003c\/strong\u003e communities, variety is the key to colour and condition.\u003c\/p\u003e\n\n\u003ch3\u003eStaple Foods\u003c\/h3\u003e\n\u003cp\u003eUse a high-quality micro pellet or finely crushed flake once or twice a day. Feed only what the group can finish in under two minutes. If you are also keeping fish such as \u003ca href=\"\/products\/tropical-fish-uk\"\u003eScissortail Rasboras - Rasbora trilineata\u003c\/a\u003e, remember that larger rasboras will take bigger foods and can outcompete these tiny fish.\u003c\/p\u003e\n\n\u003ch3\u003eSupplemental Foods\u003c\/h3\u003e\n\u003cp\u003eBaby brine shrimp, daphnia, cyclops, and finely sieved frozen foods are excellent. These improve body condition and are especially useful before spawning attempts. Live foods bring out stronger feeding response and tighter schooling. Compared with larger species like the \u003cstrong\u003eharlequin rasbora\u003c\/strong\u003e or fish commonly sold alongside the \u003cstrong\u003egalaxy rasbora\u003c\/strong\u003e, the Least Rasbora needs a noticeably smaller particle size.\u003c\/p\u003e\n\n\u003ch3\u003eTreats and Conditioning Foods\u003c\/h3\u003e\n\u003cp\u003eFor conditioning adults, use baby brine shrimp and daphnia 3-4 times per week. This helps with \u003cstrong\u003eleast rasbora breeding\u003c\/strong\u003e and supports female egg production. If you are comparing \u003cstrong\u003eRasbora urophthalmoides vs Boraras\u003c\/strong\u003e, feeding is one of the biggest practical differences: both need tiny foods, but Least Rasboras are often a little bolder at mealtime.\u003c\/p\u003e\n\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eTime\u003c\/th\u003e\n\u003cth\u003eFood\u003c\/th\u003e\n\u003cth\u003eAmount\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMorning\u003c\/td\u003e\n\u003ctd\u003eMicro pellet or crushed flake\u003c\/td\u003e\n\u003ctd\u003eSmall pinch, eaten within 2 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEvening\u003c\/td\u003e\n\u003ctd\u003eBaby brine shrimp or daphnia\u003c\/td\u003e\n\u003ctd\u003eVery small portion\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFoods to Avoid\u003c\/h3\u003e\n\u003cp\u003eAvoid oversized pellets, chunky flakes, and rich foods that sink and rot in the substrate. In mixed tanks, do not assume food intended for species like \u003cstrong\u003eblackline rasbora\u003c\/strong\u003e or larger danios is suitable here. Also be careful with medicated foods if shrimp are present, especially if you are keeping a \u003cstrong\u003eleast rasbora for shrimp tank\u003c\/strong\u003e setup.\u003c\/p\u003e\n\n\u003cdiv class=\"warning-box\"\u003e\n  \u003ch4\u003e⚠️ Feeding Warning\u003c\/h4\u003e\n  \u003cp\u003eOverfeeding causes ammonia spikes and water quality issues very quickly in nano tanks. Tiny fish produce tiny waste individually, but a full school in a small aquarium can still overwhelm the system if excess food is left uneaten.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"food-recommendation\"\u003e\n  \u003ca href=\"\/products\/tropical-fish-uk\"\u003eMicro foods for rasbora UK nano communities\u003c\/a\u003e\n  \u003cp\u003eChoose fine-particle foods suitable for very small rasboras so every fish in the school can feed properly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"food-recommendation\"\u003e\n  \u003ca href=\"\/products\/tropical-fish-uk\"\u003eFrozen baby brine shrimp for conditioning rasboras\u003c\/a\u003e\n  \u003cp\u003eExcellent for colour, breeding condition, and encouraging natural feeding behaviour.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"appearance\"\u003eWhat Does the Brilliant Rasbora Look Like? Colors, Patterns \u0026amp; Varieties\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eleast rasbora size\u003c\/strong\u003e is about 3 cm at adulthood, making it a true micro species. The body is slim and laterally compressed, with a translucent to silvery-golden base colour that can shift warmer under subdued lighting. The defining feature is the dark body marking near the caudal peduncle, paired with a spot and line that create the classic exclamation-point appearance. This is why the species is so often sold as the \u003cstrong\u003eExclamation Point Rasbora\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eRasbora urophthalmoides size\u003c\/strong\u003e makes it ideal for nano aquariums, but it also means details are best appreciated in a calm, planted display rather than a bare sales tank. In good conditions, males often show slightly richer tones and a more refined profile, while females become a bit fuller through the belly. For aquarists asking about \u003cstrong\u003ebrilliant rasbora male vs female\u003c\/strong\u003e, this body fullness is usually the easiest clue, especially when fish are conditioned on live foods.\u003c\/p\u003e\n\u003cp\u003eThere is occasional confusion with species such as \u003cstrong\u003eredtailed rasbora\u003c\/strong\u003e, \u003cstrong\u003etwospot rasbora\u003c\/strong\u003e, \u003cstrong\u003enarrow wedge rasbora\u003c\/strong\u003e, and even the hobby names \u003cstrong\u003ebrilliant green rasbora\u003c\/strong\u003e or \u003cstrong\u003eblue line rasbora\u003c\/strong\u003e. The Least Rasbora is more delicate in profile and far smaller than most of those fish. It is also sometimes compared with \u003cstrong\u003eglowlight rasbora\u003c\/strong\u003e and \u003cstrong\u003eredfin dwarf rasbora\u003c\/strong\u003e because all are attractive small schooling fish, but the body mark of \u003cem\u003eRasbora urophthalmoides\u003c\/em\u003e is distinctive once you know what to look for.\u003c\/p\u003e\n\u003cp\u003eOur photos show the clean tail marking and subtle gold-silver sheen that become much stronger over dark substrate and in tanks with tannins or floating cover. If you want the fish to look its best, keep the background dark, avoid harsh lighting, and feed varied micro foods.\u003c\/p\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat Fish Can Live With Brilliant Rasboras? Compatibility Guide\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eleast rasbora behaviour\u003c\/strong\u003e is peaceful, social, and lightly active. They are not fin nippers, not territorial, and not robust enough for rough community tanks. The best \u003cstrong\u003eleast rasbora tank mates\u003c\/strong\u003e are other tiny, calm species that enjoy similar water conditions. The same applies if you are searching for \u003cstrong\u003ebrilliant rasbora tank mates\u003c\/strong\u003e for a planted nano display. Think small Boraras, tiny peaceful catfish, Otocinclus in mature tanks, and invertebrates such as Neocaridina or Caridina shrimp.\u003c\/p\u003e\n\u003cp\u003eThis species is especially popular as a \u003cstrong\u003eleast rasbora for shrimp tank\u003c\/strong\u003e companion because adults rarely bother larger shrimp. Very small shrimplets may still be hunted opportunistically, so dense moss is important. If your goal is a heavily planted shrimp-and-fish display, this is one of the safest schooling options among \u003cstrong\u003eschooling fish UK\u003c\/strong\u003e nano species.\u003c\/p\u003e\n\n\u003ch3\u003eIdeal Tank Mates\u003c\/h3\u003e\n\u003cp\u003eGood companions include Boraras species, Otocinclus, peaceful snails, and other very small rasboras. In larger aquariums, you can also consider calm midwater species with similar temperament. For comparison, if you are researching \u003cstrong\u003escissor tail fish tank mates\u003c\/strong\u003e, remember that Scissortails grow much larger and suit a different scale of community. Likewise, searches for \u003cstrong\u003ered scat tank mates\u003c\/strong\u003e are unrelated in practice, as scats are brackish to marine-leaning and completely unsuitable with Least Rasboras.\u003c\/p\u003e\n\u003cp\u003eHobbyists often ask whether they can mix them with \u003cstrong\u003ephoenix rasbora\u003c\/strong\u003e, \u003cstrong\u003echili rasbora\u003c\/strong\u003e, \u003cstrong\u003eespei rasbora\u003c\/strong\u003e, \u003cstrong\u003eemerald eye rasbora\u003c\/strong\u003e, or \u003cstrong\u003egalaxy rasbora\u003c\/strong\u003e. In a calm, well-planted tank, the answer is often yes, with some nuance. A \u003cstrong\u003egalaxy rasbora\u003c\/strong\u003e setup can work if the tank is mature and there is enough visual structure, though galaxies can be more assertive at feeding time. That is why people ask, \u003cstrong\u003eare galaxy rasboras fin nippers\u003c\/strong\u003e? Usually no, but they can be pushier than Least Rasboras. Keep feeding stations spread out.\u003c\/p\u003e\n\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecies\u003c\/th\u003e\n\u003cth\u003eCompatible?\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003ca href=\"\/products\/tropical-fish-uk\"\u003eScissortail Rasboras - Rasbora trilineata\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd\u003e⚠️ Caution\u003c\/td\u003e\n      \u003ctd\u003ePeaceful, but much larger and better in bigger tanks\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003e\u003ca href=\"\/products\/tropical-fish-uk\"\u003eRed-Tailed Rasboras - Rasbora borapetensis\u003c\/a\u003e\u003c\/td\u003e\n      \u003ctd\u003e⚠️ Caution\u003c\/td\u003e\n      \u003ctd\u003ePossible only in larger communities with plenty of space\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eShrimp and snails\u003c\/td\u003e\n      \u003ctd\u003e✅ Yes\u003c\/td\u003e\n      \u003ctd\u003eExcellent choice with moss and cover for shrimplets\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eLarge cichlids, barbs, aggressive fish\u003c\/td\u003e\n      \u003ctd\u003e❌ Avoid\u003c\/td\u003e\n      \u003ctd\u003eToo stressful and predatory for this tiny species\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCommunity Stocking Examples\u003c\/h3\u003e\n\u003cp\u003eIn a 30-litre planted tank, a single-species group of 10-14 works beautifully. In a 45-litre setup, you might keep 12 Least Rasboras with shrimp and snails. In a mature 60-litre aquarium, a mixed micro-community with a small Boraras group and Otocinclus can work well. If you want a visible, cohesive school, avoid understocking. A \u003cstrong\u003eleast rasbora school UK\u003c\/strong\u003e display looks far better in double-digit numbers than as scattered pairs.\u003c\/p\u003e\n\u003cp\u003eFor buyers searching \u003cstrong\u003ebuy nano rasbora UK\u003c\/strong\u003e, \u003cstrong\u003eleast rasbora for sale UK\u003c\/strong\u003e, \u003cstrong\u003eleast rasbora school for sale UK\u003c\/strong\u003e, or \u003cstrong\u003ebrilliant rasbora for sale\u003c\/strong\u003e, it is worth planning the full group size before ordering. These fish are at their best in numbers.\u003c\/p\u003e\n\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003e💡 Compatibility Tip\u003c\/h4\u003e\n  \u003cp\u003eAlways quarantine new arrivals for 2-4 weeks before adding them to a nano community. Small rasboras can look healthy while carrying low-level parasites, and prevention is much easier than treatment in a planted shrimp-safe aquarium.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"breeding\"\u003eHow Do You Breed Brilliant Rasboras? Complete Breeding Guide\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eLeast rasbora breeding\u003c\/strong\u003e is possible in the home aquarium, but it is best described as moderate rather than effortless. Adults may spawn in a mature planted tank, yet raising fry consistently usually requires a dedicated setup. If you are interested in \u003cstrong\u003ebrilliant rasbora breeding\u003c\/strong\u003e, start with a conditioned group and watch for fuller females and more active males. Questions about \u003cstrong\u003ebrilliant rasbora male vs female\u003c\/strong\u003e usually come up here, and the easiest difference is that females are rounder when carrying eggs.\u003c\/p\u003e\n\n\u003ch3\u003eBreeding Setup\u003c\/h3\u003e\n\u003cp\u003eUse a small separate tank of around 15-25 litres with very gentle filtration, dim light, soft acidic water, and fine-leaved plants or spawning mops. Keep the water warm, around the upper end of the normal \u003cstrong\u003ebrilliant rasbora temperature\u003c\/strong\u003e range. Feed adults heavily with baby brine shrimp and daphnia for 1-2 weeks before pairing or group spawning attempts.\u003c\/p\u003e\n\n\u003ch3\u003eSpawning Behaviour\u003c\/h3\u003e\n\u003cp\u003eSpawning usually takes place among plants. The fish scatter eggs rather than guarding them, so adults should be removed after spawning if you want to maximise survival. This is one of the main differences when comparing \u003cstrong\u003eleast rasbora vs dwarf rasbora\u003c\/strong\u003e or \u003cstrong\u003eleast rasbora vs chili rasbora\u003c\/strong\u003e in breeding discussions: all are small egg scatterers, but behaviour and fry size can vary slightly by species.\u003c\/p\u003e\n\n\u003ch3\u003eEgg Care and Hatching\u003c\/h3\u003e\n\u003cp\u003eEggs are tiny and vulnerable to fungus if water quality is poor. Keep the breeding tank very clean, dimly lit, and gently aerated. Hatching often occurs within about 24-48 hours depending on temperature. Fry become free swimming a few days later.\u003c\/p\u003e\n\n\u003ch3\u003eFry Care\u003c\/h3\u003e\n\u003cp\u003eThe first foods should be infusoria, commercial liquid fry food, or other microscopic options, followed by newly hatched brine shrimp once the fry are large enough. This is where many attempts fail: the fry are extremely small and need appropriately tiny food from day one. If you have bred species like \u003cstrong\u003eblackline rasbora\u003c\/strong\u003e or worked with other micro-cyprinids, the principle is similar but scaled down.\u003c\/p\u003e\n\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003eAdvanced Breeding Tip\u003c\/h4\u003e\n  \u003cp\u003eUse a densely planted breeding tank with a layer of fine moss over a mesh or marbles so eggs fall out of reach of the adults. Condition the group with live foods, then perform a small cool water change to simulate rainfall and trigger spawning activity.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"comparison\"\u003eBrilliant Rasbora vs Similar Species: Which Should You Choose?\u003c\/h2\u003e\n\u003cp\u003eSmall rasboras are often grouped together online, but they are not interchangeable. If you are weighing up the \u003cstrong\u003eleast rasbora vs ember tetra\u003c\/strong\u003e, \u003cstrong\u003eleast rasbora vs chili rasbora\u003c\/strong\u003e, or \u003cstrong\u003eleast rasbora vs dwarf rasbora\u003c\/strong\u003e question, think first about the look you want, the food size you can provide, and how planted the tank will be.\u003c\/p\u003e\n\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eBrilliant Rasbora\u003c\/th\u003e\n\u003cth\u003eChili Rasbora\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax Size\u003c\/td\u003e\n\u003ctd\u003e3 cm\u003c\/td\u003e\n\u003ctd\u003e2 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCare Level\u003c\/td\u003e\n\u003ctd\u003eEasy to moderate\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature\u003c\/td\u003e\n\u003ctd\u003e23-28°C\u003c\/td\u003e\n\u003ctd\u003e24-28°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e£10.00\u003c\/td\u003e\n\u003ctd\u003eVaries\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eVisible schooling in planted nanos\u003c\/td\u003e\n\u003ctd\u003eUltra-small blackwater displays\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eBrilliant Rasbora\u003c\/th\u003e\n\u003cth\u003eGalaxy Rasbora\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eMax Size\u003c\/td\u003e\n\u003ctd\u003e3 cm\u003c\/td\u003e\n\u003ctd\u003e2.5-3 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCare Level\u003c\/td\u003e\n\u003ctd\u003eEasy to moderate\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature\u003c\/td\u003e\n\u003ctd\u003e23-28°C\u003c\/td\u003e\n\u003ctd\u003e22-26°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e£10.00\u003c\/td\u003e\n\u003ctd\u003eVaries\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003ePeaceful soft-water schools\u003c\/td\u003e\n\u003ctd\u003ePattern-focused species tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eChoose the Least Rasbora if you want a more forgiving micro species with a clear schooling effect and broad compatibility. Choose a \u003cstrong\u003egalaxy rasbora uk\u003c\/strong\u003e option if you want stronger spotting and are happy with slightly more territorial feeding behaviour. Choose \u003cstrong\u003ephoenix rasbora\u003c\/strong\u003e or \u003cstrong\u003eredfin dwarf rasbora\u003c\/strong\u003e if your priority is warmer red colour in a darker blackwater layout. If you like larger, more open-water movement, species such as \u003ca href=\"\/products\/tropical-fish-uk\"\u003eRasbora trilineata\u003c\/a\u003e are a different category entirely.\u003c\/p\u003e\n\u003cp\u003eFor some aquarists, the question is not species comparison but sourcing: \u003cstrong\u003ebuy brilliant rasbora\u003c\/strong\u003e, \u003cstrong\u003ebuy least rasbora UK\u003c\/strong\u003e, \u003cstrong\u003ebrilliant rasbora buy UK\u003c\/strong\u003e, or \u003cstrong\u003eRasbora urophthalmoides buy online UK\u003c\/strong\u003e. In those cases, buy based on health, group size, and compatibility planning rather than just the lowest listed \u003cstrong\u003eleast rasbora price UK\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch2 id=\"health\"\u003eCommon Health Problems in Brilliant Rasboras \u0026amp; How Can You Prevent Them?\u003c\/h2\u003e\n\u003cp\u003eHealthy Least Rasboras are alert, evenly coloured, and active in the midwater. They should feed eagerly, hold fins open, and move with the group rather than hiding alone. Because they are so small, stress shows quickly. A fish that clamps fins, isolates itself, or loses colour is often reacting to water quality, bullying from unsuitable tank mates, or temperature swings rather than a single dramatic disease.\u003c\/p\u003e\n\n\u003ch3\u003eSigns of a Healthy Fish\u003c\/h3\u003e\n\u003cp\u003eLook for a neat body profile, no pinched belly, no frayed fins, and smooth, controlled swimming. A settled \u003cstrong\u003ebrilliant rasbora school\u003c\/strong\u003e will spread out to feed and regroup when disturbed. If the fish constantly hug corners, re-check the \u003cstrong\u003eleast rasbora water parameters\u003c\/strong\u003e, current strength, and group size.\u003c\/p\u003e\n\n\u003ch3\u003eCommon Problems\u003c\/h3\u003e\n\u003cp\u003eThe most common issues are stress-related: poor acclimation, overfeeding, under-filtered nano tanks, and mixing them with fish that are too large or too active. Secondary bacterial infections and external parasites can take hold after stress. Because the fish are tiny, even a small ammonia spike can cause serious damage. This is why the species sometimes gets a reputation for fragility when the real problem is unstable husbandry.\u003c\/p\u003e\n\n\u003ch3\u003eTreatment and Quarantine\u003c\/h3\u003e\n\u003cp\u003eMove affected fish to a separate treatment tank if possible. Raise aeration, keep water pristine, and use medications carefully. In shrimp tanks, avoid treatments that are unsafe for invertebrates. Many nano keepers prefer supportive care first: daily small water changes, stable heat, and reduced stress. If you keep species such as \u003cstrong\u003eclown rasbora\u003c\/strong\u003e, \u003cstrong\u003eespei rasbora\u003c\/strong\u003e, or \u003cstrong\u003eglowlight rasbora\u003c\/strong\u003e in connected systems, quarantine becomes even more important to prevent cross-contamination.\u003c\/p\u003e\n\n\u003cdiv class=\"warning-box\"\u003e\n  \u003ch4\u003e⚠️ Medication Warning\u003c\/h4\u003e\n  \u003cp\u003eNEVER use copper-based medications with invertebrates present. Copper is lethal to shrimp and many snails, so always check treatment ingredients before dosing a mixed nano aquarium.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"info-box\"\u003e\n  \u003ch4\u003eQuarantine Protocol\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eUse a separate bare-bottom tank for 2-4 weeks\u003c\/li\u003e\n    \u003cli\u003eMatch temperature and pH closely to the main aquarium\u003c\/li\u003e\n    \u003cli\u003eObserve feeding response, respiration, and body condition daily\u003c\/li\u003e\n    \u003cli\u003ePerform small regular water changes to maintain stability\u003c\/li\u003e\n    \u003cli\u003eOnly move fish to the display tank once they are active and settled\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"behavior\"\u003eWhat Is Brilliant Rasbora Behaviour Like in the Aquarium?\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eleast rasbora behaviour\u003c\/strong\u003e is one of the species’ strongest selling points. They are gentle, constantly in motion, and much more effective visually in a group than as isolated individuals. This is a true schooling species, though in relaxed conditions they may form a loose shoal and spread through the midwater among plants. If startled, they tighten instantly into a coordinated group.\u003c\/p\u003e\n\u003cp\u003eThe fish are most confident when the \u003cstrong\u003eleast rasbora minimum group size\u003c\/strong\u003e is exceeded. A \u003cstrong\u003eleast rasbora school of 6\u003c\/strong\u003e can work, but 10 or more is better and creates a more natural display. This is why many keepers looking for a \u003cstrong\u003eleast rasbora school UK\u003c\/strong\u003e setup choose a dedicated planted nano rather than mixing too many species. In a proper group, the fish show more colour, feed more boldly, and spend less time hiding.\u003c\/p\u003e\n\u003cp\u003eThey are not aggressive and do not usually nip fins. If you are asking whether they behave like some danios, the answer is no. They are calmer and more delicate. They are ideal for aquarists who want visible movement without chaos.\u003c\/p\u003e\n\n\u003ch2 id=\"why-buy\"\u003eWhy Buy Brilliant Rasboras from Tropical Fish Co?\u003c\/h2\u003e\n\u003cp\u003eWhen ordering a fish this small, condition on arrival matters just as much as species choice. Our Brilliant Rasboras are selected for clear body markings, active schooling behaviour, and even size within the group, so your display starts off balanced rather than mixed with oversized and undersized fish. That matters with micro species, because a uniform group settles faster and feeds more evenly.\u003c\/p\u003e\n\u003cp\u003eBefore dispatch, fish are observed for feeding response and general condition, then packed for UK transit in insulated boxes with professional bagging methods designed for small shoaling fish. Heat packs are added in cold weather when needed, and all orders are sent by tracked delivery. This is especially important if you are searching for \u003cstrong\u003eRasbora urophthalmoides for sale UK\u003c\/strong\u003e, \u003cstrong\u003ebrilliant rasbora for sale uk\u003c\/strong\u003e, \u003cstrong\u003eleast rasbora for sale\u003c\/strong\u003e, or a healthy starter group rather than random mixed stock.\u003c\/p\u003e\n\u003cp\u003eWe also recognise that buyers searching \u003cstrong\u003erasbora UK\u003c\/strong\u003e, \u003cstrong\u003ebuy brilliant rasbora\u003c\/strong\u003e, \u003cstrong\u003ebuy exclamation point rasbora UK\u003c\/strong\u003e, or \u003cstrong\u003ebuy nano rasbora UK\u003c\/strong\u003e often need guidance on group size and compatibility. That is why this species is offered with care information focused on real-world nano tank success: suitable food size, proper shoal numbers, shrimp compatibility, and realistic tank dimensions. If you are comparing \u003cstrong\u003ebrilliant rasbora for sale\u003c\/strong\u003e listings, look beyond price alone and consider whether the seller understands micro-fish packing and acclimation.\u003c\/p\u003e\n\u003cp\u003eOrder your Brilliant Rasbora group today with confidence if you want a peaceful, elegant, and genuinely useful schooling fish for a planted nano aquarium.\u003c\/p\u003e\n\n\u003cdiv class=\"care-highlight\"\u003e\n  \u003ch4\u003eWhy Choose Tropical Fish Co for Brilliant Rasboras\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eGroups selected for even size and strong schooling behaviour, ideal for nano displays\u003c\/li\u003e\n    \u003cli\u003eHandled with micro-fish-safe packing methods suited to delicate rasbora UK orders\u003c\/li\u003e\n    \u003cli\u003eCare guidance tailored to planted tanks, shrimp-safe communities, and proper shoal numbers\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"related-products\"\u003eYou Might Also Like\u003c\/h2\u003e\n\u003cp\u003eBuild a more natural nano community by pairing your Brilliant Rasboras with carefully chosen companions and related species. For a larger, open-water contrast, see \u003ca href=\"\/products\/tropical-fish-uk\"\u003eScissortail Rasboras - Rasbora trilineata\u003c\/a\u003e. If you want another classic Asian schooling fish with a different body shape and stronger tail colour, explore \u003ca href=\"\/products\/tropical-fish-uk\"\u003eRed-Tailed Rasboras - Rasbora borapetensis\u003c\/a\u003e. You can also browse our wider \u003ca href=\"\/products\/tropical-fish-uk\"\u003erasbora UK collection\u003c\/a\u003e for more nano-friendly options. To keep a micro school in top condition, add \u003ca href=\"\/products\/tropical-fish-uk\"\u003efine-particle nano fish foods\u003c\/a\u003e and \u003ca href=\"\/products\/tropical-fish-uk\"\u003ebaby brine shrimp feeding options\u003c\/a\u003e to your setup plan. If you are designing a planted display from scratch, our broader \u003ca href=\"\/products\/tropical-fish-uk\"\u003etropical fish UK range\u003c\/a\u003e can help you build a calm, compatible community around this species.\u003c\/p\u003e","brand":"Tropical Fish Co","offers":[{"title":"Default Title","offer_id":57379662758223,"sku":"K430","price":2.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/1408\/6735\/files\/brilliant-rasbora-x-least-rasbora-hero-driftwood-k430-6-in-1-0-2.webp?v=1776553310","url":"https:\/\/tropical-fish-co.myshopify.com\/products\/galaxy-harlequin-phoenix-glowlight-brilliant-rasbora","provider":"Tropical Fish Co","version":"1.0","type":"link"}