{"product_id":"trigonostigma-heteromorpha-rasbora-harlequin-tropical-fish-uk","title":"Harlequin Black — Trigonostigma Heteromorpha (Harlequin Rasbora) - UK","description":"\u003cp\u003e\u003cem\u003eTrigonostigma heteromorpha\u003c\/em\u003e, better known as the Harlequin Rasbora, has been a favourite in the hobby for more than a century for one simple reason: few small fish combine elegance, reliability, and true community-tank manners so well. This darker strain, often searched as \u003cstrong\u003erasbora heteromorpha black\u003c\/strong\u003e or Black Harlequin, shows the classic wedge-shaped marking in a deeper, smokier body tone that stands out beautifully against plants and dark substrate. For aquarists looking for an \u003cstrong\u003eaquarium rasbora UK\u003c\/strong\u003e option that is active, peaceful, and suitable for mixed tropical setups, this fish is an excellent choice. Adult size is usually around 4.5-5 cm, lifespan can reach 5 years with stable care, and the species is widely regarded as one of the best \u003cstrong\u003etropical fish UK\u003c\/strong\u003e beginners can keep. If you have been researching \u003cstrong\u003eblack harlequin rasboras care guide\u003c\/strong\u003e, \u003cstrong\u003ehow to care for black harlequin rasboras\u003c\/strong\u003e, \u003cstrong\u003eharlequin rasbora requirements\u003c\/strong\u003e, or even \u003cstrong\u003ewhat are rasboras fish\u003c\/strong\u003e, this guide covers the practical details that matter most. See our detailed photos showing the rich dark body tone, red-tinted fins, and the signature black wedge that makes \u003cem\u003eTrigonostigma Heteromorpha\u003c\/em\u003e instantly recognisable. In the right group size and water conditions, these fish become confident midwater swimmers that add motion, contrast, and calm behaviour to a planted community aquarium.\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\u003eTrigonostigma heteromorpha\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 60 litres (about 13 UK 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 6.0-7.5\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLifespan:\u003c\/strong\u003e Up to 5 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\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 Trigonostigma\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003e\u003cem\u003eTrigonostigma heteromorpha\u003c\/em\u003e is the best known of the harlequin-type rasboras and remains one of the most widely kept small cyprinids in freshwater fishkeeping. It sits alongside related species such as \u003cstrong\u003etrigonostigma espei\u003c\/strong\u003e, \u003cstrong\u003etrigonostigma hengeli\u003c\/strong\u003e, and \u003cstrong\u003etrigonostigma truncata\u003c\/strong\u003e, all of which share a similar body shape but differ in colour tone and wedge pattern. In the aquarium trade, the darker strain is especially valued for contrast in planted layouts and blackwater-inspired community tanks.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"spec-grid\"\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"spec-value\"\u003e60L+\u003c\/div\u003e\n\u003cdiv class=\"spec-label\"\u003eMinimum tank\u003c\/div\u003e\n\u003c\/div\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\"\u003epH 6.0-7.5\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\"\u003e2-15 dGH\u003c\/div\u003e\n\u003cdiv class=\"spec-label\"\u003eHardness\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"origin\"\u003eWhere Do \u003cem\u003eTrigonostigma Heteromorpha\u003c\/em\u003e Come From? Natural Habitat Explained\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eharlequin rasbora origin\u003c\/strong\u003e lies in Southeast Asia, especially Thailand, peninsular Malaysia, and Sumatra. If you have wondered \u003cstrong\u003ewhere are harlequin rasboras native to\u003c\/strong\u003e, the answer is slow-moving forest streams, peat swamps, and shaded waters rich in leaf litter and plant cover. The \u003cstrong\u003eharlequin rasbora native range\u003c\/strong\u003e includes soft, slightly acidic habitats where tannins stain the water tea-brown and overhead vegetation reduces bright light.\u003c\/p\u003e\n\u003cp\u003eIn the wild, the \u003cstrong\u003eharlequin rasbora habitat\u003c\/strong\u003e is calm rather than fast-flowing. The \u003cstrong\u003eblack harlequin rasboras habitat\u003c\/strong\u003e we try to recreate in aquariums should therefore include subdued lighting, dense planting, open swimming lanes, and gentle filtration. A proper \u003cstrong\u003etrigonostigma heteromorpha biotope\u003c\/strong\u003e uses dark substrate, driftwood, and broad-leaved plants to mimic the sheltered edges of streams and swamp margins. This species is a classic midwater shoaler, so if you ask \u003cstrong\u003ewhere do harlequin rasboras swim\u003c\/strong\u003e or \u003cstrong\u003ewhere do harlequin rasboras swim in the tank\u003c\/strong\u003e, the answer is usually the middle level, especially around plant cover and open gaps.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eharlequin rasbora in the wild\u003c\/strong\u003e feeds on tiny invertebrates, insect larvae, micro-crustaceans, and organic matter. That natural feeding behaviour explains why they respond so well to varied prepared foods with occasional frozen or live additions. Searches such as \u003cstrong\u003erasbora heteromorpha origine\u003c\/strong\u003e and \u003cstrong\u003eharlequin rasbora natural habitat\u003c\/strong\u003e often come from aquarists trying to improve colour and confidence; in practice, recreating these softer, dimmer conditions usually makes a visible difference within days.\u003c\/p\u003e\n\u003cp\u003eBecause the species has been aquarium-bred for many generations, it adapts well to standard community conditions provided extremes are avoided. Still, understanding the \u003cstrong\u003eharlequin rasbora native\u003c\/strong\u003e environment helps you avoid common mistakes such as harsh lighting, sparse decor, or overly strong current. That is especially important with the darker Black Harlequin form, which shows its best colour in calm, shaded, planted surroundings.\u003c\/p\u003e\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003e💡 Expert Tip\u003c\/h4\u003e\n  \u003cp\u003eMimicking the natural habitat with dark substrate, wood, and patches of floating cover often improves schooling, reduces skittish behaviour, and deepens the contrast between the copper body and black wedge marking.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"tank-setup\"\u003eHow to Set Up the Perfect Tank for Black Harlequin Rasboras\u003c\/h2\u003e\n\u003cp\u003eMost questions about \u003cstrong\u003eblack harlequin rasboras tank setup\u003c\/strong\u003e come down to three things: group size, stable water, and layout. These are schooling fish, not a pair-or-trio species, so the display looks and functions best when you keep 8 or more. While the \u003cstrong\u003eblack harlequin rasboras minimum tank size\u003c\/strong\u003e is 60 litres, a longer tank gives better swimming space and more stable water quality. If you are comparing \u003cstrong\u003eharlequin rasbora minimum tank size\u003c\/strong\u003e, \u003cstrong\u003eharlequin rasbora tank size\u003c\/strong\u003e, or \u003cstrong\u003erasbora heteromorpha tank size\u003c\/strong\u003e, think of 60 litres as the minimum and 75-90 litres as the sweet spot for a proper shoal and mixed community stocking.\u003c\/p\u003e\n\u003ch3\u003eTank Size Requirements\u003c\/h3\u003e\n\u003cp\u003eThe right \u003cstrong\u003eblack harlequin rasboras tank size\u003c\/strong\u003e depends on how many fish you want and what other species will share the aquarium. A group of \u003cstrong\u003e10 harlequin rasbora\u003c\/strong\u003e is far better than \u003cstrong\u003e4 harlequin rasbora\u003c\/strong\u003e; larger groups show tighter schooling, less stress, and better colour. For a species-only setup, 60 litres works. For a planted community with bottom dwellers and a centrepiece fish, 80 litres or more is easier to manage. This is why many keepers consider them the \u003cstrong\u003ebest rasbora for community tank\u003c\/strong\u003e layouts.\u003c\/p\u003e\n\u003ch3\u003eWater Parameters\u003c\/h3\u003e\n\u003cp\u003eThe ideal \u003cstrong\u003eblack harlequin rasboras water parameters\u003c\/strong\u003e are temperature 23-28°C, pH 6.0-7.5, and hardness 2-15 dGH. If you are asking \u003cstrong\u003ewhat temp do harlequin rasboras like\u003c\/strong\u003e, \u003cstrong\u003ewhat temp for harlequin rasboras\u003c\/strong\u003e, or \u003cstrong\u003ewhat temperature do harlequin rasboras like\u003c\/strong\u003e, aim for 24-26°C for day-to-day keeping. That range is close to the \u003cstrong\u003eharlequin rasbora ideal temperature\u003c\/strong\u003e for colour, appetite, and activity. The accepted \u003cstrong\u003eharlequin rasbora temperature range\u003c\/strong\u003e is broad enough for community tanks, but stability matters more than chasing one exact number.\u003c\/p\u003e\n\u003cp\u003eFor search terms like \u003cstrong\u003eblack harlequin rasboras temperature\u003c\/strong\u003e, \u003cstrong\u003eblack harlequin rasboras water temperature\u003c\/strong\u003e, \u003cstrong\u003eharlequin rasbora temperature\u003c\/strong\u003e, \u003cstrong\u003erasbora heteromorpha temperature\u003c\/strong\u003e, and \u003cstrong\u003erasbora heteromorpha water temperature\u003c\/strong\u003e, the practical answer is simple: keep them warm, steady, and away from sudden swings. The same goes for \u003cstrong\u003eblack harlequin rasboras water hardness\u003c\/strong\u003e; soft to moderately hard water is fine, but abrupt changes are stressful.\u003c\/p\u003e\n\u003ch3\u003eFiltration\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBlack harlequin rasboras filtration needs\u003c\/strong\u003e are moderate. They enjoy clean, oxygenated water but not a blasting current. A gentle internal filter or a well-baffled hang-on-back unit works well, especially in planted aquariums. The goal is enough turnover to prevent dead spots while preserving calm midwater areas where the shoal can hold position naturally.\u003c\/p\u003e\n\u003ch3\u003eSubstrate, Plants and Decor\u003c\/h3\u003e\n\u003cp\u003eA dark sand or fine gravel substrate helps the fish feel secure and shows off the darker body tone. \u003cstrong\u003eBlack harlequin rasboras in planted tank\u003c\/strong\u003e setups are especially attractive because the fish weave through stems and gather in open spaces between plant groups. Use Cryptocoryne, Limnophila, Hygrophila, Java fern, and floating plants to break up sight lines. Broad leaves are also useful if you ever try breeding.\u003c\/p\u003e\n\u003cp\u003eFor hobbyists comparing strains, \u003ca href=\"\/products\/trigonostigma-heteromorpha\"\u003eGold Harlequin Rasboras - Trigonostigma\u003c\/a\u003e offer a brighter contrast, while \u003ca href=\"\/products\/rasbora-heteromorpha\"\u003eRasbora Heteromorpha Black Harlequin Black\u003c\/a\u003e keeps the focus on the darker morph. If you want a classic shoal, \u003ca href=\"\/products\/trigonostigma-heteromorpha\"\u003eHarlequin Rasboras - Trigonostigma Heteromorpha\u003c\/a\u003e are another strong option.\u003c\/p\u003e\n\u003ch3\u003eLighting\u003c\/h3\u003e\n\u003cp\u003eModerate lighting is ideal. Very bright light in a bare tank can wash the fish out and make them nervous. In a planted aquarium, 6-8 hours of stable light is usually enough for display and plant health. Add floating cover if the fish seem hesitant in open water.\u003c\/p\u003e\n\u003cdiv class=\"info-box\"\u003e\n  \u003ch4\u003eQuick Setup Checklist\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eChoose at least a 60-litre tank, preferably longer than tall\u003c\/li\u003e\n    \u003cli\u003eKeep a group of 8-10+ for natural schooling\u003c\/li\u003e\n    \u003cli\u003eSet temperature to 24-26°C for everyday care\u003c\/li\u003e\n    \u003cli\u003eMaintain pH 6.0-7.5 and stable hardness\u003c\/li\u003e\n    \u003cli\u003eUse gentle filtration and avoid harsh flow\u003c\/li\u003e\n    \u003cli\u003eAdd plants, wood, and shaded areas\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\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 fish. Stable biological filtration matters far more than expensive equipment, especially for small schooling species that react quickly to ammonia and nitrite.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"feeding\"\u003eWhat Do Black Harlequin Rasboras Eat? Complete Feeding Guide\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eblack harlequin rasboras diet\u003c\/strong\u003e is omnivorous, which makes feeding easy as long as food size matches their small mouths. If you are asking \u003cstrong\u003ewhat do harlequin rasbora eat\u003c\/strong\u003e, \u003cstrong\u003ewhat do harlequin rasboras eat\u003c\/strong\u003e, or \u003cstrong\u003ewhat does harlequin rasbora eat\u003c\/strong\u003e, think small, varied, and frequent rather than large heavy meals. A good \u003cstrong\u003eharlequin rasbora diet\u003c\/strong\u003e includes quality micro pellets or crushed flakes as the staple, with frozen foods such as daphnia, cyclops, and bloodworm used as supplements.\u003c\/p\u003e\n\u003ch3\u003eStaple Foods\u003c\/h3\u003e\n\u003cp\u003eFor everyday feeding, use a fine tropical flake or micro pellet that stays suspended briefly in the water column. This matches their midwater feeding style and reduces waste. Aquarists searching \u003cstrong\u003ewhat food do harlequin rasboras eat\u003c\/strong\u003e or \u003cstrong\u003ewhat to feed harlequin rasbora\u003c\/strong\u003e should choose foods rich in protein but not oversized. Small fish often spit out food that looks suitable to us but is still too large for them.\u003c\/p\u003e\n\u003ch3\u003eSupplemental Foods\u003c\/h3\u003e\n\u003cp\u003eA proper \u003cstrong\u003eblack harlequin rasboras feeding guide\u003c\/strong\u003e should include variety. Frozen daphnia, cyclops, baby brine shrimp, and finely chopped bloodworm help maintain condition and encourage stronger colour. Yes, \u003cstrong\u003ecan harlequin rasboras eat bloodworms\u003c\/strong\u003e is a common question, and the answer is yes, but offer them as part of a varied plan rather than the only food.\u003c\/p\u003e\n\u003ch3\u003eTreats, Shrimp and Snails\u003c\/h3\u003e\n\u003cp\u003eQuestions like \u003cstrong\u003edo harlequin rasboras eat shrimp\u003c\/strong\u003e, \u003cstrong\u003ewill harlequin rasboras eat shrimp\u003c\/strong\u003e, \u003cstrong\u003ewill harlequin rasboras eat baby shrimp\u003c\/strong\u003e, \u003cstrong\u003ewill harlequin rasboras eat cherry shrimp\u003c\/strong\u003e, \u003cstrong\u003ewill.harlequin rasboras eat amano shrimp\u003c\/strong\u003e, \u003cstrong\u003eharlequin rasbora eat shrimp\u003c\/strong\u003e, and \u003cstrong\u003eharlequin rasbora eat snails\u003c\/strong\u003e need a nuanced answer. Adult Amano shrimp are usually safe. Adult cherry shrimp may coexist in dense planting, but tiny shrimplets can be eaten. They generally do not hunt snails, though they may pick at very small soft-bodied hatchlings or leftover food around snails.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan harlequin rasboras eat betta food\u003c\/strong\u003e? Sometimes, yes, if it is small enough, but betta pellets are usually too large and too rich as a staple. Better to use foods formulated for small community fish.\u003c\/p\u003e\n\u003ch3\u003eFeeding Frequency\u003c\/h3\u003e\n\u003cp\u003eFeed once or twice daily in portions they finish within 30-60 seconds. If you are wondering \u003cstrong\u003ewhy is my harlequin rasboras not eating\u003c\/strong\u003e, check transport stress, temperature, ammonia, bullying, or food size before assuming disease. Newly introduced fish often settle faster when the room is quiet and the lights are dimmed.\u003c\/p\u003e\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 30-60 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEvening\u003c\/td\u003e\n\u003ctd\u003eFrozen daphnia, cyclops, or baby brine shrimp\u003c\/td\u003e\n\u003ctd\u003eVery small portion\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"food-recommendation\"\u003e\n  \u003ca href=\"\/products\/tropical-fish-uk\"\u003eMicro community fish foods\u003c\/a\u003e work best when particle size is small enough for rasboras to take in one bite without repeated spitting.\n\u003c\/div\u003e\n\u003cdiv class=\"food-recommendation\"\u003e\n  \u003ca href=\"\/products\/tropical-fish-uk\"\u003eFrozen bloodworm and daphnia options\u003c\/a\u003e are excellent for conditioning adults before breeding and for bringing out stronger feeding response.\n\u003c\/div\u003e\n\u003cdiv class=\"warning-box\"\u003e\n  \u003ch4\u003e⚠️ Feeding Warning\u003c\/h4\u003e\n  \u003cp\u003eOverfeeding causes ammonia spikes, cloudy water, and sluggish fish. Small schooling species need tiny meals, not large handfuls. Uneaten food trapped in plants can quickly spoil water quality in warm tanks.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"appearance\"\u003eWhat Does \u003cem\u003eTrigonostigma Heteromorpha\u003c\/em\u003e Look Like? Appearance, Colours \u0026amp; Varieties\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eTrigonostigma Heteromorpha\u003c\/em\u003e has a deep, laterally compressed body with a gently arched back, forked tail, and the famous black wedge extending across the rear half of the body. Standard fish show copper-orange to pinkish tones, but the Black Harlequin strain has a duskier, more chocolate-toned body that creates stronger contrast against the wedge. This is why searches for \u003cstrong\u003erasbora heteromorpha\u003c\/strong\u003e and \u003cstrong\u003erasbora heteromorpha black\u003c\/strong\u003e often lead aquarists toward planted display tanks with darker decor.\u003c\/p\u003e\n\u003cp\u003eAdult size is usually around 5 cm, making them ideal for medium nano-to-community aquariums. The fins often show red or orange tinting, especially when fish are settled, well fed, and kept in warm, stable water. Our photos show the intense dark sheen achieved through good nutrition, stress-free transport, and display over dark substrate.\u003c\/p\u003e\n\u003cp\u003eIf you are comparing \u003cstrong\u003eblack harlequin rasboras or ember tetra\u003c\/strong\u003e or \u003cstrong\u003eblack harlequin rasboras vs neon tetra\u003c\/strong\u003e, the Black Harlequin offers a deeper-bodied shape and a more formal schooling look. They also tend to appear calmer and more coordinated in midwater groups.\u003c\/p\u003e\n\u003cp\u003eSexing adults is possible but subtle. In general, \u003cstrong\u003eblack harlequin rasboras male vs female\u003c\/strong\u003e differences include slimmer males with a sharper wedge and fuller females, especially when carrying eggs. This matters if you plan \u003cstrong\u003erasbora heteromorpha care\u003c\/strong\u003e with breeding in mind. The species is often recommended as one of the \u003cstrong\u003eblack harlequin rasboras for beginners\u003c\/strong\u003e because the fish are hardy, attractive, and forgiving once basic needs are met.\u003c\/p\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat Fish Can Live With Black Harlequin Rasboras? Compatibility Guide\u003c\/h2\u003e\n\u003cp\u003eIf you are asking \u003cstrong\u003ewhat fish can live with rasboras\u003c\/strong\u003e, the good news is that Black Harlequins are among the safest schooling fish for peaceful community tanks. \u003cstrong\u003eAre harlequin rasboras schooling fish\u003c\/strong\u003e? Yes, and \u003cstrong\u003eare rasboras schooling fish\u003c\/strong\u003e in general? Also yes, though some species shoal more tightly than others. This species does best in a group, and a larger shoal spreads confidence through the tank. If you ever ask \u003cstrong\u003ewhy are my harlequin rasboras not schooling\u003c\/strong\u003e, the usual causes are too few fish, too much open space, stress, or incompatible tank mates.\u003c\/p\u003e\n\u003cp\u003eTemperament is gentle. \u003cstrong\u003eAre harlequin rasboras aggressive\u003c\/strong\u003e, \u003cstrong\u003eare rasboras aggressive\u003c\/strong\u003e, or \u003cstrong\u003eare rasbora heteromorpha aggressive\u003c\/strong\u003e? In normal conditions, no. \u003cstrong\u003eCan harlequin rasboras be aggressive\u003c\/strong\u003e? Only mildly during feeding or if kept in very small groups, but they are not a true aggressive species. That makes them ideal \u003cstrong\u003eblack harlequin rasboras compatible fish\u003c\/strong\u003e candidates for peaceful tetras, small rasboras, kuhli loaches, Corydoras, and calm gouramis.\u003c\/p\u003e\n\u003ch3\u003eIdeal Tank Mates\u003c\/h3\u003e\n\u003cp\u003eStrong options for \u003cstrong\u003eharlequin rasbora tank mates\u003c\/strong\u003e include \u003ca href=\"\/products\/tropical-fish-uk\"\u003eDwarf Rasboras - Boraras Maculatus\u003c\/a\u003e for a layered rasbora display, \u003ca href=\"\/products\/tropical-fish-uk\"\u003eScissortail Rasboras - Rasbora Trilineata\u003c\/a\u003e in larger tanks, and \u003ca href=\"\/products\/tropical-fish-uk\"\u003eDwarf Gourami\u003c\/a\u003e as a calm centrepiece fish. Bottom-level companions such as \u003cstrong\u003epangio kuhlii\u003c\/strong\u003e are also excellent because they use a different zone of the aquarium.\u003c\/p\u003e\n\u003cp\u003eMany keepers ask \u003cstrong\u003ecan harlequin rasboras live with neon tetras\u003c\/strong\u003e. Yes, in most planted community tanks they mix well. \u003cstrong\u003eCan harlequin rasboras live with guppies\u003c\/strong\u003e? Sometimes, but guppies prefer harder water and can be more boisterous. \u003cstrong\u003eCan harlequin rasboras live with mollies\u003c\/strong\u003e? Less ideal for the same reason, especially if the mollies are large and the water is hard and alkaline. \u003cstrong\u003eCan harlequin rasboras live with bettas\u003c\/strong\u003e or \u003cstrong\u003ecan rasbora heteromorpha live with bettas\u003c\/strong\u003e? Often yes, if the betta is calm and the tank is spacious with line-of-sight breaks. \u003cstrong\u003eCan harlequin rasboras live with angelfish\u003c\/strong\u003e? Usually not recommended long term unless the tank is large and the angelfish are unusually peaceful; adult angelfish may view small rasboras as food.\u003c\/p\u003e\n\u003ch3\u003eShrimp and Invertebrates\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan harlequin rasboras live with shrimp\u003c\/strong\u003e? Yes, with caution. Adult Amano shrimp are generally safe. Adult cherry shrimp may survive in dense cover, but shrimplets are vulnerable. This is why searches such as \u003cstrong\u003eharlequin rasbora and cherry shrimp\u003c\/strong\u003e, \u003cstrong\u003eharlequin rasbora cherry shrimp\u003c\/strong\u003e, and even the German query \u003cstrong\u003ekeilfleckbrbling und garnelen\u003c\/strong\u003e are so common. The fish are peaceful, but they are still opportunistic micro-predators when tiny moving prey appears.\u003c\/p\u003e\n\u003ch3\u003eSpecies to Avoid\u003c\/h3\u003e\n\u003cp\u003eAvoid large cichlids, fin-nipping barbs, and hyperactive fish that dominate feeding time. The same caution applies to some gouramis; while \u003cstrong\u003etrichogaster lalius\u003c\/strong\u003e can work in a calm setup, any territorial individual should be monitored closely.\u003c\/p\u003e\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\"\u003eDwarf Gourami\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e✅ Yes\u003c\/td\u003e\n\u003ctd\u003eWorks in planted tanks if the gourami is calm and the tank is not cramped.\u003c\/td\u003e\n\u003c\/tr\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✅ Yes\u003c\/td\u003e\n\u003ctd\u003eGood in larger aquariums with open swimming space.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/tropical-fish-uk\"\u003eDwarf Rasboras - Boraras Maculatus\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e⚠️ Caution\u003c\/td\u003e\n\u003ctd\u003ePeaceful, but feed carefully so the smaller species gets enough food.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eAdult Angelfish\u003c\/td\u003e\n\u003ctd\u003e❌ Avoid\u003c\/td\u003e\n\u003ctd\u003eMay prey on rasboras as they mature.\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\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 an established shoal. This protects small schooling fish from parasites and gives you time to confirm feeding response and temperament.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"breeding\"\u003eHow to Breed \u003cem\u003eTrigonostigma Heteromorpha\u003c\/em\u003e: Complete Breeding Guide\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHarlequin rasbora breeding\u003c\/strong\u003e is very achievable for prepared aquarists, though it is more specialised than breeding livebearers. If you are wondering \u003cstrong\u003eare harlequin rasboras easy to breed\u003c\/strong\u003e or \u003cstrong\u003edo harlequin rasboras breed easily\u003c\/strong\u003e, the honest answer is: moderately. They are not difficult once conditioned, but they do need the right water and spawning surfaces. \u003cstrong\u003eBlack harlequin rasboras breeding\u003c\/strong\u003e follows the same pattern as standard forms.\u003c\/p\u003e\n\u003ch3\u003eBreeding Setup\u003c\/h3\u003e\n\u003cp\u003eA dedicated 30-45 litre breeding tank works well. Use soft, slightly acidic water, subdued light, and broad-leaved plants such as Cryptocoryne. This is the basis of a good \u003cstrong\u003eharlequin rasbora breeding guide\u003c\/strong\u003e. Condition pairs or a small group with varied foods for 1-2 weeks beforehand. For breeders researching \u003cstrong\u003etrigonostigma heteromorpha breeding\u003c\/strong\u003e or \u003cstrong\u003erasbora heteromorpha breeding\u003c\/strong\u003e, water softness is often the missing factor.\u003c\/p\u003e\n\u003ch3\u003eSpawning Behaviour\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDo harlequin rasboras lay eggs\u003c\/strong\u003e and \u003cstrong\u003edo rasboras lay eggs\u003c\/strong\u003e? Yes. Unlike many egg-scattering cyprinids, they attach adhesive eggs to the underside of broad leaves. Typical \u003cstrong\u003eharlequin rasbora breeding behavior\u003c\/strong\u003e includes the female turning upside down beneath a leaf while the male joins her in a close embrace. This is one of the most distinctive spawning rituals among small community fish.\u003c\/p\u003e\n\u003cp\u003eIf you are asking \u003cstrong\u003ewhat do rasbora eggs look like\u003c\/strong\u003e, \u003cstrong\u003eharlequin rasbora eggs\u003c\/strong\u003e are small, clear to pale amber adhesive eggs attached under leaves rather than dropped freely across the tank.\u003c\/p\u003e\n\u003ch3\u003eEgg Care and Hatching\u003c\/h3\u003e\n\u003cp\u003eRemove the adults after spawning because they may eat the eggs. \u003cstrong\u003eHarlequin rasbora eggs hatching\u003c\/strong\u003e usually occurs in about 24-36 hours depending on temperature, and fry become free-swimming a few days later. Keep the tank dim and very clean. Gentle aeration is useful, but strong flow is not.\u003c\/p\u003e\n\u003ch3\u003eFry Care\u003c\/h3\u003e\n\u003cp\u003eA newly free-swimming \u003cstrong\u003eharlequin rasbora baby\u003c\/strong\u003e is tiny and needs infusoria, commercial fry food, or very fine live foods before moving onto baby brine shrimp. Growth is steady but not especially fast. Good hygiene and small water changes are critical.\u003c\/p\u003e\n\u003cp\u003eFor those checking \u003cstrong\u003eblack harlequin rasboras male vs female\u003c\/strong\u003e before pairing, females are usually fuller-bodied and males slimmer with a sharper wedge edge. That visual difference becomes clearer when fish are mature and conditioned.\u003c\/p\u003e\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003eAdvanced Breeding Tip\u003c\/h4\u003e\n  \u003cp\u003eUse a separate spawning tank with very soft water, a pH near the lower end of their range, and broad Cryptocoryne leaves positioned under dim light. Many breeders get better fertility when the pair is moved into the breeding tank in the evening and allowed to spawn at first light.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"comparison\"\u003eBlack Harlequin Rasboras vs Similar Species: Which Should You Choose?\u003c\/h2\u003e\n\u003cp\u003eComparison matters because several harlequin-type rasboras are sold under similar names. If you are deciding between the darker Black Harlequin and more standard orange forms, the choice usually comes down to display style. The Black Harlequin suits planted tanks with wood, leaf litter tones, and darker aquascapes, while brighter forms pop more in lighter layouts.\u003c\/p\u003e\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eBlack Harlequin Rasbora\u003c\/th\u003e\n\u003cth\u003eGold Harlequin 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\u003eAbout 5 cm\u003c\/td\u003e\n\u003ctd\u003eAbout 5 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\u003eEasy to moderate\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\u003e23-28°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e£26.13\u003c\/td\u003e\n\u003ctd\u003eVaries by listing\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eDark planted community tanks\u003c\/td\u003e\n\u003ctd\u003eBrighter contrast in mixed displays\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eBlack Harlequin Rasbora\u003c\/th\u003e\n\u003cth\u003eEmber Tetra\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBody Shape\u003c\/td\u003e\n\u003ctd\u003eDeeper-bodied, wedge-marked\u003c\/td\u003e\n\u003ctd\u003eSlimmer, glowing orange\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eSchooling Style\u003c\/td\u003e\n\u003ctd\u003eTight and coordinated\u003c\/td\u003e\n\u003ctd\u003eLoose to moderate\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest Visual Effect\u003c\/td\u003e\n\u003ctd\u003eContrast against greens and dark wood\u003c\/td\u003e\n\u003ctd\u003eWarm colour pop in nano tanks\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBeginner Suitability\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003ctd\u003eExcellent\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eCalm midwater community groups\u003c\/td\u003e\n\u003ctd\u003eSmaller warm-toned aquascapes\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eIf you like the classic form, compare this fish with \u003ca href=\"\/products\/trigonostigma-heteromorpha\"\u003eHarlequin Rasboras\u003c\/a\u003e. If you want a brighter sibling, consider \u003ca href=\"\/products\/trigonostigma-heteromorpha\"\u003eGold Harlequin Rasboras - Trigonostigma\u003c\/a\u003e. For hobbyists exploring related species such as \u003cstrong\u003etrigonostigma espei\u003c\/strong\u003e, \u003cstrong\u003etrigonostigma hengeli\u003c\/strong\u003e, or even searches like \u003cstrong\u003eespes keilfleckbrbling\u003c\/strong\u003e and \u003cstrong\u003ehengels keilfleckbrbling\u003c\/strong\u003e, the main differences are body depth, wedge shape, and the intensity of orange or copper tones. The Black Harlequin remains the most balanced choice for a peaceful, highly visible, midwater shoal.\u003c\/p\u003e\n\n\u003ch2 id=\"health\"\u003eCommon Health Problems in Black Harlequin Rasboras \u0026amp; How to Prevent Them\u003c\/h2\u003e\n\u003cp\u003eGood \u003cstrong\u003eblack harlequin rasboras health\u003c\/strong\u003e starts with clean water, a proper group size, and low stress. Healthy fish hold their fins open, feed eagerly, maintain a smooth body profile, and school without clamping or darting. Because they are small, problems can escalate quickly if water quality slips.\u003c\/p\u003e\n\u003ch3\u003eCommon Diseases\u003c\/h3\u003e\n\u003cp\u003eThe most common \u003cstrong\u003eblack harlequin rasboras diseases\u003c\/strong\u003e are stress-related opportunistic issues such as ich, fin damage from poor transport or bullying, and bacterial infections after water quality problems. \u003cstrong\u003eHarlequin rasbora diseases\u003c\/strong\u003e are not unusual in newly imported fish if acclimation is rushed. \u003cstrong\u003eHarlequin rasbora ich\u003c\/strong\u003e appears as tiny white grains over the body and fins, often with flashing or rubbing. A \u003cstrong\u003eharlequin rasbora white spot on mouth\u003c\/strong\u003e may indicate injury, fungus, or bacterial infection rather than classic ich, so inspect carefully before treating.\u003c\/p\u003e\n\u003ch3\u003eIllness and Treatment\u003c\/h3\u003e\n\u003cp\u003eAny \u003cstrong\u003eharlequin rasbora illness\u003c\/strong\u003e should be approached with a water-test-first mindset. Check ammonia, nitrite, nitrate, and temperature before adding medication. Small daily or alternate-day water changes often help more than random treatment. If shrimp are present, remember that medication choice matters.\u003c\/p\u003e\n\u003cdiv class=\"warning-box\"\u003e\n  \u003ch4\u003e⚠️ Medication Warning\u003c\/h4\u003e\n  \u003cp\u003eNEVER use copper-based medications in tanks with shrimp or other sensitive invertebrates. Copper can be lethal even at low concentrations. If you keep rasboras with shrimp, treat fish in a separate hospital tank whenever possible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"info-box\"\u003e\n  \u003ch4\u003eQuarantine Protocol\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eUse a separate heated tank for 2-4 weeks\u003c\/li\u003e\n    \u003cli\u003eObserve appetite, respiration, and fin condition daily\u003c\/li\u003e\n    \u003cli\u003eTest water regularly and keep ammonia\/nitrite at zero\u003c\/li\u003e\n    \u003cli\u003eOnly move fish once they are feeding strongly and symptom-free\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003ePrevention is straightforward: keep the shoal large enough, avoid aggressive tank mates, maintain stable \u003cstrong\u003eharlequin rasbora water parameters\u003c\/strong\u003e, and do regular water changes. Many health problems blamed on the species are actually caused by cramped groups, overfeeding, or unstable heating. Compared with more delicate species, they are robust, which is why they are often recommended alongside guides for \u003cstrong\u003ebrilliant rasbora care\u003c\/strong\u003e and other beginner-friendly community fish.\u003c\/p\u003e\n\n\u003ch2 id=\"behavior\"\u003eAre Black Harlequin Rasboras Schooling Fish? Understanding Their Behaviour\u003c\/h2\u003e\n\u003cp\u003eYes, \u003cstrong\u003eare harlequin rasboras schooling fish\u003c\/strong\u003e is one of the easiest questions to answer: absolutely. They are active midwater shoalers that become more coordinated and visually impressive as group size increases. The species is most relaxed in groups of 8 or more, and 10-12 often looks even better in a planted tank.\u003c\/p\u003e\n\u003cp\u003eIf you notice scattered fish and wonder \u003cstrong\u003ewhy are my harlequin rasboras not schooling\u003c\/strong\u003e, check the environment. In very safe, heavily planted aquariums they may spread out more because they do not feel threatened. In sparse tanks they may huddle tightly. Both can be normal depending on context. The key is whether they are feeding well and interacting calmly.\u003c\/p\u003e\n\u003cp\u003eThey are not bottom sitters and not surface specialists. As noted earlier, \u003cstrong\u003ewhere do harlequin rasboras swim in the tank\u003c\/strong\u003e is mostly the middle zone, though they will move higher during feeding. They are peaceful with \u003cstrong\u003eblack harlequin rasboras with other fish\u003c\/strong\u003e when tank mates share similar water and temperament. This balance of motion, colour, and calm behaviour is why many aquarists consider them the \u003cstrong\u003ebest rasbora for community tank\u003c\/strong\u003e setups.\u003c\/p\u003e\n\n\u003ch2 id=\"why-buy\"\u003eWhy Buy from Tropical Fish Co?\u003c\/h2\u003e\n\u003cp\u003eWhen you \u003cstrong\u003ebuy black harlequin rasboras UK\u003c\/strong\u003e, consistency matters. This species looks best when the whole group is healthy, evenly sized, and feeding well from day one. Our Black Harlequin groups are selected for strong wedge pattern, clean finnage, and the darker body tone that makes this strain so effective in planted aquariums. That attention to group quality is especially important with shoaling fish, where one weak individual can unsettle the whole display.\u003c\/p\u003e\n\u003cp\u003eEach batch is rested, observed, and checked for active feeding before listing. We do not treat this species like a generic tetra substitute; these fish are prepared for life in heated UK home aquariums, with stable acclimation to common community conditions. For customers searching \u003cstrong\u003ewhere to buy black harlequin rasboras UK\u003c\/strong\u003e, \u003cstrong\u003eblack harlequin rasboras for sale UK\u003c\/strong\u003e, \u003cstrong\u003eblack harlequin rasboras online UK\u003c\/strong\u003e, or \u003cstrong\u003eorder black harlequin rasboras UK\u003c\/strong\u003e, the goal is simple: receive a settled shoal that starts feeding quickly and colours up fast.\u003c\/p\u003e\n\u003cp\u003eFish are packed in insulated boxes with professional bagging and seasonal heat packs when required. Tracked dispatch helps reduce travel uncertainty, and careful packing is especially important for small schooling fish that can stress if chilled. If you compare the \u003cstrong\u003eblack harlequin rasboras price UK\u003c\/strong\u003e with random mixed-stock sellers, remember that preparation, observation, and correct packing directly affect survival and early behaviour. For aquarists looking to \u003cstrong\u003ebuy live fish online uk\u003c\/strong\u003e, browse \u003cstrong\u003etropical fish uk for sale\u003c\/strong\u003e, or find the \u003cstrong\u003ebest place to buy tropical fish online uk\u003c\/strong\u003e, healthy handling is worth more than the lowest headline price.\u003c\/p\u003e\n\u003cp\u003eWe also provide practical support after arrival, including acclimation guidance and realistic advice on \u003cstrong\u003eblack harlequin rasboras delivery UK\u003c\/strong\u003e, group size, and compatibility. If you have been tempted by \u003cstrong\u003echeap black harlequin rasboras UK\u003c\/strong\u003e listings, remember that weakly conditioned shoaling fish often cost more in losses and stress than a properly prepared group. Order your Black Harlequin Rasboras today with confidence and build a calmer, more elegant community tank around one of the hobby's most dependable small cyprinids.\u003c\/p\u003e\n\u003cdiv class=\"care-highlight\"\u003e\n  \u003ch4\u003eWhy Choose Tropical Fish Co for Black Harlequin Rasboras\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eGroups selected for even size, clear wedge markings, and strong dark body tone\u003c\/li\u003e\n    \u003cli\u003eObserved for feeding response before dispatch so the shoal settles faster on arrival\u003c\/li\u003e\n    \u003cli\u003eInsulated, season-aware packing designed specifically for small tropical schooling fish\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\u003eTo build a balanced rasbora display, consider adding \u003ca href=\"\/products\/trigonostigma-heteromorpha\"\u003eGold Harlequin Rasboras - Trigonostigma\u003c\/a\u003e if you want a brighter companion strain, or \u003ca href=\"\/products\/trigonostigma-heteromorpha\"\u003eHarlequin Rasboras\u003c\/a\u003e for the classic look. In larger aquariums, \u003ca href=\"\/products\/tropical-fish-uk\"\u003eScissortail Rasboras - Rasbora Trilineata\u003c\/a\u003e add movement in the upper-mid levels, while \u003ca href=\"\/products\/tropical-fish-uk\"\u003eDwarf Rasboras - Boraras Maculatus\u003c\/a\u003e suit softer, more delicate planted layouts. For a calm centrepiece, \u003ca href=\"\/products\/tropical-fish-uk\"\u003eDwarf Gourami\u003c\/a\u003e can work well in a spacious planted tank. You can also explore our wider \u003ca href=\"\/products\/tropical-fish-uk\"\u003etropical fish UK collection\u003c\/a\u003e for compatible community species and suitable foods for small omnivorous shoalers.\u003c\/p\u003e","brand":"Tropical Fish Co","offers":[{"title":"3 cm","offer_id":57469614063951,"sku":"4147","price":5.21,"currency_code":"GBP","in_stock":true},{"title":"2,5 cm","offer_id":57470141956431,"sku":"4146","price":3.47,"currency_code":"GBP","in_stock":true},{"title":"1.8-2 cm","offer_id":57560855904591,"sku":"S046","price":3.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/1408\/6735\/files\/trigonostigma-heteromorpha-x-black-harlequin-rasbora-hero-driftwood-4147.webp?v=1776546518","url":"https:\/\/tropical-fish-co.myshopify.com\/products\/trigonostigma-heteromorpha-rasbora-harlequin-tropical-fish-uk","provider":"Tropical Fish Co","version":"1.0","type":"link"}