{"product_id":"corydoras-cory-catfish-panda-sterbai-albino-uk-2100-2101","title":"Black Widow Tetra — Cory Catfish (Corydoras) - UK","description":"\u003cp\u003eIf you are searching for a lively, reliable community fish that adds contrast and movement without demanding specialist care, the \u003cstrong\u003eBlack Widow Tetra\u003c\/strong\u003e, \u003cem\u003eGymnocorymbus ternetzi\u003c\/em\u003e, is a standout choice. Although this page targets the popular \u003cstrong\u003eCory Catfish\u003c\/strong\u003e search term, many aquarists actually keep Black Widow Tetras alongside bottom-dwelling \u003ca href=\"\/products\/cory-catfish\"\u003eBronze Cory Catfish Corydoras Aeneus\u003c\/a\u003e and \u003ca href=\"\/products\/cory-catfish\"\u003eSterbai Cory Corydoras Tropical Fish Catfish\u003c\/a\u003e because the combination works so well in peaceful tropical aquariums. Black Widows come from South America, usually reach around 6 cm, live for about 5 years with good care, and are widely considered one of the best schooling tetras for mixed tanks. Their smoky black fins, silver-grey body, and confident midwater swimming make them a dramatic contrast to the gentle foraging behaviour of corydoras on the substrate below.\u003c\/p\u003e\u003cp\u003eSee our detailed photos showing body shape, finnage, and the bold dark skirt that gives this species its common name. For fishkeepers comparing \u003cstrong\u003ecory catfish size\u003c\/strong\u003e, \u003cstrong\u003ecory catfish lifespan\u003c\/strong\u003e, and community suitability, Black Widow Tetras are often chosen as upper-level companions because they share similar water chemistry and appreciate a planted, well-filtered setup. If you have been researching the \u003cstrong\u003eBlack Widow Tetra: A Dramatic and Hardy Aquarium Star Scientific Name: Gymnocorymbus ternetzi\u003c\/strong\u003e, wondering about \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi tank size\u003c\/strong\u003e, \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi temperature\u003c\/strong\u003e, or the best \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi tank mates\u003c\/strong\u003e, this guide covers practical care in detail so you can build a thriving tropical community with confidence.\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\u003eGymnocorymbus ternetzi\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 (13+ gallons)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTemperature:\u003c\/strong\u003e 22-28°C (72-82°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, active, 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 Characiformes\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFamily:\u003c\/strong\u003e Characidae\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGenus:\u003c\/strong\u003e \u003cem\u003eGymnocorymbus\u003c\/em\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eThe Black Widow Tetra belongs to the characin family, a large South American group that includes many classic community fish. In the aquarium hobby it has long been valued as a hardy, adaptable tetra for beginners, especially in planted aquariums and mixed tropical displays. It is frequently paired with corydoras species because the two groups occupy different tank levels and usually coexist very well.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"origin\"\u003eWhere Do Black Widow Tetras Come From? Natural Habitat Explained\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi habitat\u003c\/strong\u003e is found in South America, especially within the Paraguay and Guaporé river basins. These waters are typically slow-moving to moderately flowing, with submerged roots, marginal vegetation, leaf litter, and shaded areas that soften the light. In the wild, this species spends much of its time in the middle water column, moving in loose groups and feeding on small invertebrates, plant matter, and organic particles drifting in the current.\u003c\/p\u003e\n\u003cp\u003eFor aquarists who also ask \u003cstrong\u003ewhere do corydoras catfish come from\u003c\/strong\u003e, \u003cstrong\u003ewhere are corydoras native to\u003c\/strong\u003e, and \u003cstrong\u003ewhere do corydoras live\u003c\/strong\u003e, the answer is similar in a broad sense: many corydoras also come from South American freshwater systems. That is one reason Black Widow Tetras and corys are such a natural pairing in aquariums. If you keep \u003ca href=\"\/products\/cory-catfish\"\u003eAdolfo'S Cory Corydoras Adolfoi Hardy Aquaruom\u003c\/a\u003e, \u003ca href=\"\/products\/cory-catfish\"\u003eLittle Cory Corydoras Nanus Light-Spot Catfish\u003c\/a\u003e, or \u003ca href=\"\/products\/cory-catfish\"\u003eBlack Cory Corydoras Tropical Fish\u003c\/a\u003e, you can often recreate a convincing South American community by matching soft décor, open swimming space, and stable tropical temperatures.\u003c\/p\u003e\n\u003cp\u003eIn nature, the water is not always crystal clear. Tannins from wood and leaf litter can tint it slightly, and dense bankside growth creates dappled light. This matters because fish raised in aquariums still show stronger colour and calmer behaviour when their environment includes cover. Aquarists researching \u003cstrong\u003ecorydoras in the wild\u003c\/strong\u003e, \u003cstrong\u003ecorydoras natural habitat\u003c\/strong\u003e, \u003cstrong\u003ewhere do corydoras like to hide\u003c\/strong\u003e, or even \u003cstrong\u003ewhere do corydoras lay eggs\u003c\/strong\u003e are often trying to understand how natural behaviour translates into tank design. The same principle applies here: mimic the habitat, and you get better feeding response, stronger schooling, and less stress.\u003c\/p\u003e\n\u003cp\u003eBlack Widow Tetras are not pond fish in the UK climate, so unlike searches such as \u003cstrong\u003epygmy cory catfish in pond\u003c\/strong\u003e, they should be kept indoors in heated aquariums year-round. Their native habitat is tropical, not temperate. While odd search phrases like \u003cstrong\u003ecory 36 lakeville\u003c\/strong\u003e may appear online, the important takeaway for fishkeepers is simple: recreate a warm, planted South American setting and these tetras settle quickly.\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 side planting improves colour, reduces nervous pacing, and encourages a tighter schooling group. In my experience, Black Widows kept in bright bare tanks look washed out and can become nippier than fish given visual cover.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"tank-setup\"\u003eHow to Set Up the Perfect Tank for Black Widow Tetras\u003c\/h2\u003e\n\u003cp\u003eA proper \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi tank setup\u003c\/strong\u003e starts with understanding that this is an active midwater schooling fish, not a solitary ornament. The official \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi minimum tank size\u003c\/strong\u003e is 60 litres, but that is really the floor, not the ideal. A group of 6 can live in a 60-litre aquarium, yet a 75-90 litre tank gives noticeably better swimming room and helps spread any mild fin-nipping within the group rather than onto tank mates. If you are comparing this with \u003cstrong\u003ecorydoras catfish tank size\u003c\/strong\u003e, \u003cstrong\u003ecorydoras tank size\u003c\/strong\u003e, \u003cstrong\u003epanda cory catfish tank size\u003c\/strong\u003e, or \u003cstrong\u003epygmy cory catfish tank size\u003c\/strong\u003e, remember that tetras need horizontal swimming space while corys need floor area.\u003c\/p\u003e\n\u003ch3\u003eTank Size Requirements\u003c\/h3\u003e\n\u003cp\u003eFor a peaceful community, aim for 75 litres or more. This becomes even more important if you want a proper \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi schooling group\u003c\/strong\u003e of 8-10 fish. Larger groups tend to show more natural behaviour and less harassment toward slower tank mates. Aquarists who ask about \u003cstrong\u003edwarf cory catfish tank size\u003c\/strong\u003e, \u003cstrong\u003emay pygmy cory catfish tank size\u003c\/strong\u003e, \u003cstrong\u003epygmy cory catfish minimum tank size\u003c\/strong\u003e, or \u003cstrong\u003epanda cory catfish minimum tank size\u003c\/strong\u003e are usually balancing footprint and stocking level; the same logic applies here.\u003c\/p\u003e\n\u003ch3\u003eWater Parameters\u003c\/h3\u003e\n\u003cp\u003eThe recommended \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi water temperature range\u003c\/strong\u003e is 22-28°C, with 24-26°C being a sweet spot for long-term community care. The ideal \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi pH requirements\u003c\/strong\u003e sit between 6.0 and 7.5, and hardness between 5 and 20 dGH. These fish are adaptable, but sudden swings are far more dangerous than a stable reading slightly outside the midpoint. If you are also checking \u003cstrong\u003epanda cory catfish temperature\u003c\/strong\u003e, \u003cstrong\u003epanda cory fish temperature\u003c\/strong\u003e, \u003cstrong\u003epanda cory catfish tank temperature\u003c\/strong\u003e, \u003cstrong\u003ewhat temp do panda cory catfish like\u003c\/strong\u003e, or \u003cstrong\u003epygmy cory catfish temperature\u003c\/strong\u003e, there is useful overlap for mixed community tanks.\u003c\/p\u003e\n\n\u003cdiv class=\"spec-grid\"\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"spec-value\"\u003e22-28°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\"\u003e6.0-7.5\u003c\/div\u003e\n\u003cdiv class=\"spec-label\"\u003epH\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"spec-card\"\u003e\n\u003cdiv class=\"spec-value\"\u003e5-20 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\"\u003e60L+\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\u003c\/h3\u003e\n\u003cp\u003eUse a reliable filter that turns the tank over around 5-8 times per hour without creating a blasting current. Black Widows appreciate oxygen-rich water but not a torrent. A mature sponge or internal filter works well in smaller tanks, while larger community setups benefit from a compact external filter. Keep the outflow aimed to create surface movement rather than a direct jet through the school.\u003c\/p\u003e\n\u003ch3\u003eSubstrate\u003c\/h3\u003e\n\u003cp\u003eBecause these fish occupy the middle region, substrate choice is more about the whole community than the tetra alone. If you are keeping them with corys, choose smooth sand or fine rounded gravel to protect barbels. This is especially important for keepers of \u003ca href=\"\/products\/cory-catfish\"\u003eAlbino Golden Corydora Neon Cory Catfish\u003c\/a\u003e or \u003ca href=\"\/products\/cory-catfish\"\u003eRed Neon Bronze Cory Corydoras Aeneus\u003c\/a\u003e, which spend constant time sifting the bottom.\u003c\/p\u003e\n\u003ch3\u003ePlants \u0026amp; Decor\u003c\/h3\u003e\n\u003cp\u003eDense side and rear planting with open central swimming space is ideal. Java fern, Amazon swords, Cryptocoryne, Limnophila, and floating plants all work well. Add driftwood and a few shaded zones to create \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi hiding spots\u003c\/strong\u003e. This species is excellent \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi for planted aquarium\u003c\/strong\u003e displays because the dark finnage contrasts beautifully with green foliage.\u003c\/p\u003e\n\u003ch3\u003eLighting\u003c\/h3\u003e\n\u003cp\u003eModerate lighting is best. Very bright light without cover can make them skittish. A 7-9 hour photoperiod suits most community tanks. Floating plants can soften the light and help fish display more natural \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi behaviour\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv class=\"info-box\"\u003e\n  \u003ch4\u003e🔹 Quick Setup Checklist\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eTank of 60 litres minimum, 75 litres preferred\u003c\/li\u003e\n    \u003cli\u003eGroup of at least 6, ideally 8-10\u003c\/li\u003e\n    \u003cli\u003eTemperature stable at 24-26°C\u003c\/li\u003e\n    \u003cli\u003epH between 6.0 and 7.5\u003c\/li\u003e\n    \u003cli\u003eGood filtration with gentle to moderate flow\u003c\/li\u003e\n    \u003cli\u003ePlants at sides and back, open swimming area in front\u003c\/li\u003e\n    \u003cli\u003eDark décor to improve colour and confidence\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 tank for 4-6 weeks before adding fish. Many new keepers focus on \u003cstrong\u003ehow to care for black widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi\u003c\/strong\u003e but forget that stable biological filtration matters more than any bottled additive.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"feeding\"\u003eWhat Do Black Widow Tetras Eat? Complete Feeding Guide\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi diet\u003c\/strong\u003e is straightforward: they are omnivores and accept most quality aquarium foods. In the wild they pick at insect larvae, tiny crustaceans, plant fragments, and suspended organic matter. In captivity, the best \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi feeding guide\u003c\/strong\u003e combines a dependable staple with regular protein-rich extras.\u003c\/p\u003e\n\u003ch3\u003eStaple Foods\u003c\/h3\u003e\n\u003cp\u003eUse a high-quality tropical flake or micro-pellet as the base diet. Feed only what the group can consume in 30-60 seconds, once or twice daily. Despite online myths, they are not a true \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi bottom feeder\u003c\/strong\u003e, \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi algae eater\u003c\/strong\u003e, or \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi tank cleaner\u003c\/strong\u003e. They will pick at sinking items, but they should not be expected to live on leftovers.\u003c\/p\u003e\n\u003ch3\u003eSupplemental Foods\u003c\/h3\u003e\n\u003cp\u003eFor better colour and condition, offer frozen or live daphnia, bloodworm, mosquito larvae, and brine shrimp 2-3 times per week. This is especially useful when conditioning fish for \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi breeding\u003c\/strong\u003e. Variety also helps if you keep mixed communities with corys and are comparing questions such as \u003cstrong\u003ewhat do panda cory catfish eat\u003c\/strong\u003e, \u003cstrong\u003ewhat do panda cory fish eat\u003c\/strong\u003e, \u003cstrong\u003ewhat to feed panda cory catfish\u003c\/strong\u003e, \u003cstrong\u003ewhat do pygmy cory catfish eat\u003c\/strong\u003e, \u003cstrong\u003ewhat do pygmy cory fish eat\u003c\/strong\u003e, or \u003cstrong\u003ewhat to feed pygmy cory catfish\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eFeeding Frequency \u0026amp; Timing\u003c\/h3\u003e\n\u003cp\u003eMost groups do well with two small feeds daily. Searches like \u003cstrong\u003ewhat time pygmy cory catfish eat\u003c\/strong\u003e, \u003cstrong\u003ewhat time pygmy cory catfish can eat\u003c\/strong\u003e, \u003cstrong\u003ewhat time pygmy cory catfish need to eat\u003c\/strong\u003e, \u003cstrong\u003ewhen pygmy cory catfish eat\u003c\/strong\u003e, \u003cstrong\u003ewhat day pygmy cory catfish eat\u003c\/strong\u003e, and \u003cstrong\u003ewhat day pygmy cory catfish eat food\u003c\/strong\u003e reflect a common worry: timing matters less than consistency and making sure shy fish get a share. Feed Black Widows at roughly the same times each day, and if corys are in the same tank, add sinking foods after lights dim slightly so bottom fish are not outcompeted.\u003c\/p\u003e\n\u003ch3\u003eFoods to Avoid\u003c\/h3\u003e\n\u003cp\u003eAvoid fatty mammal meats, stale foods, and excessive freeze-dried-only diets. Also avoid assuming corys or tetras will control pest snails; searches such as \u003cstrong\u003ewhat corydoras eat snails\u003c\/strong\u003e and \u003cstrong\u003ewhich corydoras eat snails\u003c\/strong\u003e are usually answered with “very few, and not reliably.” If a fish stops feeding, check water quality first. The question \u003cstrong\u003ewhy pygmy cory catfish not eating\u003c\/strong\u003e often points to stress, transport shock, or poor oxygen levels rather than food preference.\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\u003eQuality tropical flake or micro-pellet\u003c\/td\u003e\n\u003ctd\u003eSmall pinch, eaten within 1 minute\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eEvening\u003c\/td\u003e\n\u003ctd\u003eFrozen daphnia, brine shrimp, or fine granules\u003c\/td\u003e\n\u003ctd\u003eSmall portion, no leftovers after 2 minutes\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\/cory-catfish\"\u003ePair with sinking foods for Corydoras companions\u003c\/a\u003e\n  \u003cp\u003eIf your Black Widows share a tank with corys, include a dedicated sinking pellet or wafer so bottom fish are not forced to compete at the surface.\u003c\/p\u003e\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 stressed fish. Black Widow Tetras are enthusiastic feeders and will beg for more, but a slim belly line and active swimming are healthier than a bloated group in a dirty tank.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"appearance\"\u003eWhat Does the Black Widow Tetra Look Like? Colors, Patterns \u0026amp; Varieties\u003c\/h2\u003e\n\u003cp\u003eThe classic Black Widow Tetra has a tall, laterally compressed body with a silver-grey base colour and distinctive dark vertical barring behind the gill area. The dorsal, anal, and pelvic fins deepen into smoky charcoal or black, creating the “widow” look that stands out in planted aquariums. The average \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi size\u003c\/strong\u003e is around 5-6 cm, making it large enough to be visible in a community tank but still suitable for modest aquarium sizes.\u003c\/p\u003e\n\u003cp\u003eFemales are usually slightly deeper-bodied and fuller when mature, while males tend to look slimmer. Younger fish often show sharper contrast, and adults in good condition develop a rich velvety black in the fins when kept over dark décor. Our photos show the best contrast achieved through stable water quality, moderate lighting, and a proper group size.\u003c\/p\u003e\n\u003cp\u003eSome keepers compare them with cory species when planning a display and ask about \u003cstrong\u003ecorydoras duplicareus size\u003c\/strong\u003e, \u003cstrong\u003ecory catfish types\u003c\/strong\u003e, or whether a certain catfish will visually balance the tank. Black Widows pair especially well with patterned bottom fish such as \u003ca href=\"\/products\/cory-catfish\"\u003eGold Laser Cory Corydoras CW010\u003c\/a\u003e or the spotted look of \u003cstrong\u003ecorydoras julii\u003c\/strong\u003e-type fish. If you have seen searches like \u003cstrong\u003ebuy black widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi UK\u003c\/strong\u003e, \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi for sale UK\u003c\/strong\u003e, \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi price UK\u003c\/strong\u003e, \u003cstrong\u003eorder black widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi online UK\u003c\/strong\u003e, or \u003cstrong\u003elive black widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi for sale UK\u003c\/strong\u003e, appearance is one of the main reasons hobbyists choose them: few easy tetras offer such strong contrast.\u003c\/p\u003e\n\n\u003ch2 id=\"compatibility\"\u003eWhat Fish Can Live With Black Widow Tetras? Compatibility Guide\u003c\/h2\u003e\n\u003cp\u003eBlack Widow Tetras are usually peaceful, but they are active and can nip long flowing fins if kept in too small a group or cramped conditions. That is why the best \u003cstrong\u003ebest black widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi for community tank\u003c\/strong\u003e setup includes at least 6 fish, with 8-10 even better. A proper \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi group size\u003c\/strong\u003e spreads social energy and makes them a far more \u003cstrong\u003epeaceful black widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi for aquarium\u003c\/strong\u003e choice.\u003c\/p\u003e\n\u003ch3\u003eIdeal Tank Mates\u003c\/h3\u003e\n\u003cp\u003eExcellent companions include rasboras, other medium tetras, peaceful rainbowfish, and many corydoras. If you are asking \u003cstrong\u003ewhat corydoras can live together\u003c\/strong\u003e, \u003cstrong\u003ewhat corydoras school together\u003c\/strong\u003e, or \u003cstrong\u003eare corydoras schooling fish\u003c\/strong\u003e, the safest answer is to keep each cory species in its own group of 6 or more where possible, then combine that group with a midwater school like Black Widows. Good options include \u003ca href=\"\/products\/cory-catfish\"\u003eBronze Cory Catfish Corydoras Aeneus\u003c\/a\u003e, \u003ca href=\"\/products\/cory-catfish\"\u003eSterbai Cory Corydoras Tropical Fish Catfish\u003c\/a\u003e, \u003ca href=\"\/products\/cory-catfish\"\u003eGold Laser Cory Corydoras CW010\u003c\/a\u003e, \u003ca href=\"\/products\/cory-catfish\"\u003eLittle Cory Corydoras Nanus Light-Spot Catfish\u003c\/a\u003e, and \u003ca href=\"\/products\/cory-catfish\"\u003eAdolfo'S Cory Corydoras Adolfoi Hardy Aquaruom\u003c\/a\u003e. These are classic examples of \u003cstrong\u003epeaceful catfish UK\u003c\/strong\u003e hobbyists look for when building a South American community.\u003c\/p\u003e\n\u003ch3\u003eSpecies to Avoid\u003c\/h3\u003e\n\u003cp\u003eAvoid fancy guppies, male bettas with long fins, and slow ornamental fish unless the tank is large and heavily planted. Queries such as \u003cstrong\u003ecan corydoras live with bettas\u003c\/strong\u003e, \u003cstrong\u003ecan panda cory catfish live with betta fish\u003c\/strong\u003e, and \u003cstrong\u003ecan panda cory catfish live with bettas\u003c\/strong\u003e are about corys rather than tetras, but the same caution applies: the betta may be fine with bottom catfish yet stressed by active midwater tetras. Also avoid large cichlids; \u003cstrong\u003ecan corydoras live with cichlids\u003c\/strong\u003e is usually only true for carefully chosen dwarf species, not aggressive predators.\u003c\/p\u003e\n\u003ch3\u003eCommunity Tank Examples\u003c\/h3\u003e\n\u003cp\u003eIn a 75-litre tank, try 8 Black Widow Tetras with 6 Bronze Corys. In a 90-litre setup, 10 Black Widows with 8 Sterbai Corys and a few snails works well. In a planted 120-litre aquarium, you can combine Black Widows, a cory group, and a small upper-level shoal. If you are wondering about \u003cstrong\u003e2 corydoras\u003c\/strong\u003e, that is not enough for proper social behaviour; corys should be kept in groups.\u003c\/p\u003e\n\u003ch3\u003eCompatibility with Shrimp and Goldfish\u003c\/h3\u003e\n\u003cp\u003eAdult shrimp may coexist in dense planting, but baby shrimp can be eaten. So for questions like \u003cstrong\u003eare corydoras safe with shrimp\u003c\/strong\u003e and \u003cstrong\u003ecan corydoras live with shrimp\u003c\/strong\u003e, the answer is “usually with adult shrimp, less so with shrimplets.” Black Widows may also eat tiny shrimp if the opportunity arises. Goldfish are not suitable companions because of temperature and waste differences. That also answers \u003cstrong\u003ecan corydoras live with goldfish\u003c\/strong\u003e and \u003cstrong\u003ecan panda cory catfish live with goldfish\u003c\/strong\u003e: generally no.\u003c\/p\u003e\n\u003cp\u003eFor temperament questions, \u003cstrong\u003eare cory catfish aggressive\u003c\/strong\u003e, \u003cstrong\u003eare panda cory catfish aggressive\u003c\/strong\u003e, and \u003cstrong\u003eare pygmy cory catfish aggressive\u003c\/strong\u003e are all usually answered with no. Corys are among the gentlest community fish. Likewise, \u003cstrong\u003ecan pygmy cory catfish live together\u003c\/strong\u003e and \u003cstrong\u003ecan pygmy cory catfish live with other fish\u003c\/strong\u003e are yes, provided tank mates are peaceful and not too boisterous.\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\/cory-catfish\"\u003eSterbai Cory Corydoras Tropical Fish Catfish\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e✅ Yes\u003c\/td\u003e\n\u003ctd\u003eExcellent bottom-dwelling companion with similar tropical requirements.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/cory-catfish\"\u003eBronze Cory Catfish Corydoras Aeneus\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003e✅ Yes\u003c\/td\u003e\n\u003ctd\u003eHardy, active, and a strong match for community aquariums.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLong-finned bettas or fancy guppies\u003c\/td\u003e\n\u003ctd\u003e⚠️ Caution\u003c\/td\u003e\n\u003ctd\u003eMay trigger fin-nipping, especially if tetra group is too small.\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLarge aggressive cichlids\u003c\/td\u003e\n\u003ctd\u003e❌ Avoid\u003c\/td\u003e\n\u003ctd\u003eStress, predation risk, and incompatible behaviour.\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 a community tank. Many “compatibility problems” are actually illness or stress from newly imported fish being mixed too quickly.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"breeding\"\u003eHow Do You Breed Black Widow Tetras? Complete Breeding Guide\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBlack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi breeding\u003c\/strong\u003e is considered easier than many tetras, though raising fry still takes planning. Mature females look rounder, especially when full of eggs, while males are slimmer. Condition adults with varied foods for 1-2 weeks before attempting to spawn them.\u003c\/p\u003e\n\u003ch3\u003eBreeding Setup\u003c\/h3\u003e\n\u003cp\u003eUse a separate 25-40 litre breeding tank with soft, slightly acidic water and fine-leaved plants or spawning mops. Keep lighting dim. A temperature around 26°C often helps. This section also answers broader searches like \u003cstrong\u003ebreeding cory catfish\u003c\/strong\u003e, \u003cstrong\u003ecory catfish breeding\u003c\/strong\u003e, \u003cstrong\u003ehow to breed panda cory catfish\u003c\/strong\u003e, and \u003cstrong\u003epygmy cory catfish breeding\u003c\/strong\u003e in one important way: whether you breed tetras or corys, a dedicated spawning setup gives much better survival than a busy community tank.\u003c\/p\u003e\n\u003ch3\u003eSpawning Behaviour\u003c\/h3\u003e\n\u003cp\u003eWell-conditioned Black Widows scatter adhesive eggs among plants. Adults may eat eggs, so remove them after spawning. Aquarists asking \u003cstrong\u003ewhen can corydoras breed\u003c\/strong\u003e, \u003cstrong\u003ewhen do corydoras breed\u003c\/strong\u003e, \u003cstrong\u003ewhen do corydoras spawn\u003c\/strong\u003e, \u003cstrong\u003ewhen do corydoras lay eggs\u003c\/strong\u003e, or \u003cstrong\u003ewhen do corydoras start breeding\u003c\/strong\u003e are usually looking for triggers; with Black Widows, frequent water changes and rich feeding are common cues.\u003c\/p\u003e\n\u003ch3\u003eEgg Care \u0026amp; Fry\u003c\/h3\u003e\n\u003cp\u003eEggs usually hatch in about 24-36 hours depending on temperature, and fry become free-swimming a few days later. Start with infusoria or liquid fry food, then move to newly hatched brine shrimp. This is similar to many discussions around \u003cstrong\u003ecory catfish eggs\u003c\/strong\u003e, \u003cstrong\u003ecory catfish fry\u003c\/strong\u003e, and \u003cstrong\u003ecorydoras fry growth rate\u003c\/strong\u003e: tiny first foods and clean water are critical.\u003c\/p\u003e\n\u003cp\u003eFor people researching corys specifically, common questions include \u003cstrong\u003ewhat do panda cory catfish eggs look like\u003c\/strong\u003e, \u003cstrong\u003ewhat day pygmy cory catfish have babies\u003c\/strong\u003e, \u003cstrong\u003ewhen pygmy cory catfish have babies\u003c\/strong\u003e, \u003cstrong\u003ecorydoras habrosus breeding\u003c\/strong\u003e, and \u003cstrong\u003epygmy cory cat breeding\u003c\/strong\u003e. Corys lay eggs rather than giving birth, and so do Black Widows. The exact timing varies with conditioning, age, and water changes. Also, \u003cstrong\u003ewhat corydoras can cross breed\u003c\/strong\u003e is a separate concern for cory keepers; Black Widow Tetras are not part of that issue because they are a different genus entirely.\u003c\/p\u003e\n\u003cdiv class=\"tip-box\"\u003e\n  \u003ch4\u003eAdvanced Breeding Tip\u003c\/h4\u003e\n  \u003cp\u003eUse a bare-bottom breeding tank with a mesh or marbles beneath the spawning area so eggs fall out of reach of the adults. This simple change can dramatically improve hatch rates compared with breeding in a standard display tank.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"comparison\"\u003eBlack Widow Tetra vs Cory Catfish and Similar Community Fish: Which Should You Choose?\u003c\/h2\u003e\n\u003cp\u003eShoppers often compare these fish because they serve different but complementary roles. If you searched for \u003cstrong\u003ecory catfish for sale\u003c\/strong\u003e, \u003cstrong\u003ecorydoras catfish for sale\u003c\/strong\u003e, \u003cstrong\u003ecorydoras fish for sale\u003c\/strong\u003e, or \u003cstrong\u003ebuy panda cory catfish\u003c\/strong\u003e, you may still be deciding whether your tank needs a bottom shoal, a midwater school, or both. The simplest answer is this: Black Widow Tetras provide movement and contrast in the middle of the tank, while corys provide constant activity at the bottom.\u003c\/p\u003e\n\u003ctable class=\"comparison-table\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eBlack Widow Tetra\u003c\/th\u003e\n\u003cth\u003eBronze Cory\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\u003e6 cm\u003c\/td\u003e\n\u003ctd\u003e6-7 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCare Level\u003c\/td\u003e\n\u003ctd\u003eEasy\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\u003e22-28°C\u003c\/td\u003e\n\u003ctd\u003e22-28°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e£10.65\u003c\/td\u003e\n\u003ctd\u003eVaries by strain\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eMidwater schooling display\u003c\/td\u003e\n\u003ctd\u003eBottom-dwelling community activity\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 Widow Tetra\u003c\/th\u003e\n\u003cth\u003ePanda Cory\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\u003e6 cm\u003c\/td\u003e\n\u003ctd\u003e4.5-5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCare Level\u003c\/td\u003e\n\u003ctd\u003eEasy\u003c\/td\u003e\n\u003ctd\u003eModerate\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eTemperature\u003c\/td\u003e\n\u003ctd\u003e22-28°C\u003c\/td\u003e\n\u003ctd\u003e22-25°C preferred\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePrice\u003c\/td\u003e\n\u003ctd\u003e£10.65\u003c\/td\u003e\n\u003ctd\u003eUsually slightly higher\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eBest For\u003c\/td\u003e\n\u003ctd\u003eActive schooling contrast\u003c\/td\u003e\n\u003ctd\u003eSmaller peaceful bottom group\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eIf you want a fish that is especially visible from across the room, choose Black Widows. If you enjoy subtle, constant substrate activity, choose corys. In larger tanks, keep both. This is often the best answer for hobbyists comparing \u003cstrong\u003ecorydoras panda\u003c\/strong\u003e, \u003cstrong\u003ebronze corydoras\u003c\/strong\u003e, \u003cstrong\u003ecorydoras paleatus\u003c\/strong\u003e, \u003cstrong\u003esterbas corydoras\u003c\/strong\u003e, or even asking \u003cstrong\u003ewhich pygmy cory catfish is best\u003c\/strong\u003e, \u003cstrong\u003ewhich pygmy cory catfish should i buy\u003c\/strong\u003e, \u003cstrong\u003ewhich pygmy cory catfish should i get\u003c\/strong\u003e, \u003cstrong\u003ewhich pygmy cory catfish\u003c\/strong\u003e, or \u003cstrong\u003ewhich pygmy cory catfish for sale\u003c\/strong\u003e. The right choice depends on tank footprint, temperature, and whether you want midwater or bottom-level behaviour.\u003c\/p\u003e\n\n\u003ch2 id=\"health\"\u003eCommon Health Problems in Black Widow Tetras \u0026amp; How to Prevent Them\u003c\/h2\u003e\n\u003cp\u003eStrong \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi health\u003c\/strong\u003e starts with clean, stable water and a proper group size. Healthy fish swim confidently in the middle of the tank, feed eagerly, and show smooth finnage without clamped fins or white spots. Their dark fin colour should look even rather than patchy, and the body should be neither hollow-bellied nor bloated.\u003c\/p\u003e\n\u003ch3\u003eCommon Diseases \u0026amp; Symptoms\u003c\/h3\u003e\n\u003cp\u003eThe main \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi diseases\u003c\/strong\u003e seen in home aquariums are ich, fin damage from stress or nipping, and bacterial infections secondary to poor water quality. Like many tropical fish, they can develop white spot after transport stress or sudden temperature changes. Cory keepers often ask \u003cstrong\u003ecan corydoras get ich\u003c\/strong\u003e; yes, they can, and so can Black Widows.\u003c\/p\u003e\n\u003ch3\u003eTreatment \u0026amp; Prevention\u003c\/h3\u003e\n\u003cp\u003ePrevention is better than treatment. Keep ammonia and nitrite at zero, nitrate low, and avoid abrupt changes. Quarantine all new fish. Feed varied foods and do regular weekly water changes of 25-30%. If you keep corys in the same aquarium, choose medications carefully because some catfish are sensitive to harsh treatments. Also remember that searches like \u003cstrong\u003ecan corydoras live with cichlids\u003c\/strong\u003e often arise after stress-related disease in mixed tanks; unsuitable tank mates are a hidden health problem.\u003c\/p\u003e\n\u003cdiv class=\"warning-box\"\u003e\n  \u003ch4\u003e⚠️ Medication Warning\u003c\/h4\u003e\n  \u003cp\u003eNever dose blindly. If shrimp are present, avoid copper-based treatments because they are lethal to invertebrates. Even in fish-only tanks, always confirm the diagnosis before medicating and increase aeration during treatment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"info-box\"\u003e\n  \u003ch4\u003e🔹 Quarantine Protocol\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eUse a separate heated tank for 2-4 weeks\u003c\/li\u003e\n    \u003cli\u003eObserve feeding response and respiration daily\u003c\/li\u003e\n    \u003cli\u003eCheck for white spots, clamped fins, or flashing\u003c\/li\u003e\n    \u003cli\u003ePerform small regular water changes\u003c\/li\u003e\n    \u003cli\u003eOnly add fish to the display once stable and feeding well\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2 id=\"behavior\"\u003eWhat Is Black Widow Tetra Behaviour Like in the Aquarium?\u003c\/h2\u003e\n\u003cp\u003eThe typical \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi behaviour\u003c\/strong\u003e is active, social, and alert. They spend most of the day cruising the middle of the tank, especially in a visible \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi schooling group\u003c\/strong\u003e. They are not shy once settled, but they do appreciate cover and can become jumpy in bare, brightly lit tanks.\u003c\/p\u003e\n\u003cp\u003eThese fish are ideal \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi for beginners\u003c\/strong\u003e because their needs are simple and their behaviour is easy to read. If the group is too small, they may become pushy or fin-nippy. If the tank is too cold or water quality slips, they lose confidence and colour. In a balanced setup, they show a loose shoaling pattern with occasional bursts of synchronized swimming.\u003c\/p\u003e\n\u003cp\u003eThey also work well as \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi with other fish\u003c\/strong\u003e provided companions are peaceful and not long-finned. Their ideal \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi group size\u003c\/strong\u003e is 6+, though 8-10 is better. This social structure is one reason they combine so well with cory groups at the bottom, creating activity across the full tank.\u003c\/p\u003e\n\n\u003ch2 id=\"why-buy\"\u003eWhy Buy Black Widow Tetras from Tropical Fish Co?\u003c\/h2\u003e\n\u003cp\u003eWhen buying active schooling fish, consistency matters more than hype. Black Widow Tetras should arrive with intact fins, strong swimming posture, and a clear feeding response. We select batches for even size and community suitability so your new group settles faster and shows more natural schooling from day one. That matters whether you are searching \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi buy online UK\u003c\/strong\u003e, \u003cstrong\u003ewhere to buy black widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi UK\u003c\/strong\u003e, \u003cstrong\u003eblack widow tetra: a dramatic and hardy aquarium star scientific name: gymnocorymbus ternetzi shop UK\u003c\/strong\u003e, or simply comparing \u003cstrong\u003ecorydoras catfish price\u003c\/strong\u003e and tetra value for a community setup.\u003c\/p\u003e\n\u003cp\u003eBefore dispatch, fish are observed for condition, feeding, and transport readiness. They are packed in insulated boxes with appropriate bagging, and heat packs are used in cold weather. Tracked transport helps reduce delays, which is especially important for live fish. If you are comparing options like \u003cstrong\u003elive catfish delivery UK\u003c\/strong\u003e, \u003cstrong\u003ebuy pygmy cory catfish\u003c\/strong\u003e, \u003cstrong\u003edwarf cory catfish for sale\u003c\/strong\u003e, \u003cstrong\u003ecould pygmy cory catfish for sale\u003c\/strong\u003e, or \u003cstrong\u003ehas pygmy cory catfish for sale\u003c\/strong\u003e, the same principle applies: healthy fish and careful packing are worth more than a vague low price.\u003c\/p\u003e\n\u003cp\u003eWe also support sensible stocking decisions. If your tank is better suited to corys first, we will say so. If your aquarium needs a midwater school to complete the layout, Black Widows are one of the strongest choices because they are hardy, visible, and adaptable. Order your Black Widow Tetras today with confidence and build a balanced tropical display with movement at every level.\u003c\/p\u003e\n\u003cdiv class=\"care-highlight\"\u003e\n  \u003ch4\u003eWhy Choose Tropical Fish Co for Black Widow Tetras\u003c\/h4\u003e\n  \u003cul\u003e\n    \u003cli\u003eGroups selected for even size and better schooling behaviour in community aquariums\u003c\/li\u003e\n    \u003cli\u003eFish observed for feeding response and transport fitness before dispatch\u003c\/li\u003e\n    \u003cli\u003eIdeal companion species available, including multiple Corydoras options for full-tank stocking\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\u003eComplete your South American community with a bottom group such as \u003ca href=\"\/products\/cory-catfish\"\u003eBronze Cory Catfish Corydoras Aeneus\u003c\/a\u003e, a striking patterned option like \u003ca href=\"\/products\/cory-catfish\"\u003eSterbai Cory Corydoras Tropical Fish Catfish\u003c\/a\u003e, or a brighter contrast fish such as \u003ca href=\"\/products\/cory-catfish\"\u003eGold Laser Cory Corydoras CW010\u003c\/a\u003e. For smaller peaceful setups, \u003ca href=\"\/products\/cory-catfish\"\u003eLittle Cory Corydoras Nanus Light-Spot Catfish\u003c\/a\u003e is a smart choice. If you prefer unusual tones on the substrate, consider \u003ca href=\"\/products\/cory-catfish\"\u003eBlack Cory Corydoras Tropical Fish\u003c\/a\u003e or \u003ca href=\"\/products\/cory-catfish\"\u003eAlbino Golden Corydora Neon Cory Catfish\u003c\/a\u003e. These species pair naturally with Black Widow Tetras in planted tropical aquariums and help create activity from top to bottom.\u003c\/p\u003e","brand":"Tropical Fish Co","offers":[{"title":"3 - 4 cm","offer_id":57469619208527,"sku":"2102","price":3.39,"currency_code":"GBP","in_stock":true},{"title":"1,5 - 2 cm","offer_id":57470136418639,"sku":"2100","price":3.39,"currency_code":"GBP","in_stock":true},{"title":"2,5 - 3 cm","offer_id":57470136451407,"sku":"2101","price":3.39,"currency_code":"GBP","in_stock":true},{"title":"4 - 5 cm","offer_id":57470136484175,"sku":"2119","price":3.39,"currency_code":"GBP","in_stock":true},{"title":"XL (5 - 6cm)","offer_id":57470136516943,"sku":"2120","price":4.24,"currency_code":"GBP","in_stock":true},{"title":"1-1.5 cm","offer_id":57560850268495,"sku":"SA01","price":2.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1007\/1408\/6735\/files\/black-widow-tetra-a-dramatic-and-hardy-aquarium-star-sc-hero-driftwood-2102.webp?v=1776719362","url":"https:\/\/tropical-fish-co.myshopify.com\/products\/corydoras-cory-catfish-panda-sterbai-albino-uk-2100-2101","provider":"Tropical Fish Co","version":"1.0","type":"link"}