Easy
Delta Tail Male Betta (Betta splendens, Super Delta Blue)
24–30°C · pH 6–7.5 · 20L
£15.99
Striking Halfmoon Butterfly Betta Male with flowing fins and bold colour contrast. Ideal for display tanks. Order today with live arrival guarantee.
Adult size is the maximum length this species reaches at full maturity (scientific sources). The livestock you receive will be younger and smaller — pick a size variant above for the actual shipping size. Photos are AI-enhanced, so the animal may show subtle colour or marking differences.
Betta spl. male halfmoon butterfly
Striking Halfmoon Butterfly Betta Male with flowing fins and bold colour contrast. Ideal for display tanks. Order today with live arrival guarantee.
Adult size is the maximum length this species reaches at full maturity (scientific sources). The livestock you receive will be younger and smaller — pick a size variant above for the actual shipping size. Photos are AI-enhanced, so the animal may show subtle colour or marking differences.
The betta fish is one of the most popular and most misunderstood freshwater species. This guide covers everything from proper tank size to the truth about tank mates.
Maintain these water conditions for optimal health and vibrant colors
The Halfmoon Butterfly Betta Male is one of the most eye-catching forms of Betta splendens, prized for its dramatic 180-degree tail spread, crisp butterfly patterning, and confident top-level swimming style. For most keepers, the single biggest factor in long-term success is getting the betta fish temperature right. These are tropical labyrinth fish from Southeast Asia, and stable warmth matters just as much as food or filtration. A healthy male usually reaches around 7 cm, can live up to 3 years with excellent care, and suits aquarists looking for a striking centrepiece fish with manageable betta fish care needs. Sound halfmoon betta care and siamese fighting fish care follow the same fundamentals: warmth, clean water, and a calm tank. If you are planning your first betta fish tank setup, or upgrading from a bowl to a proper heated aquarium, this variety rewards good husbandry with stronger colour, better finnage, and more active behaviour. For a full reference, see our authoritative betta fish care guide.
Because this is a long-finned male, the right betta fish water temperature, low current, resting places near the surface, and an appropriate betta fish tank size all make a visible difference. Sensible betta fish aquarium requirements include warm water, gentle filtration, a secure lid, and easy access to the surface for air breathing. Our detailed photos show the contrast in the fins and body patterning so you can judge tail shape, colour balance, and overall condition before purchase. If you want a show fish that combines bold personality, elegant finnage, and suitability for a carefully planned nano display, this Halfmoon Butterfly Betta is an excellent choice.
Betta splendens belongs to the labyrinth fish group, meaning it can breathe atmospheric air using a specialised labyrinth organ. In the aquarium hobby, selective breeding has produced many tail types and colour forms, with the Halfmoon among the most sought-after. The butterfly pattern adds a clean edge contrast to the fins, making this male especially desirable for display aquariums and collectors comparing Halfmoon, veiltail, double tail, koi, and super red strains.
Domestic bettas trace their origin to Thailand and wider Southeast Asia, where wild ancestors inhabit slow-moving waters such as shallow floodplains, rice paddies, canals, marshes, and vegetated ditches. Understanding the natural betta fish habitat helps explain why they do best in calm, warm aquariums rather than fast-flowing community tanks. In nature, the betta fish habitat temperature is typically tropical and stable, with dense plant cover, leaf litter, and low to moderate mineral content. That is why a thoughtful betta fish tank habitat should focus on warmth, cover, and surface access rather than excessive current.
A well-planned betta fish tank ecosystem mimics these conditions with broad-leaved plants, floating cover, and gentle open swimming space near the top. Many keepers ask, are betta fish pond fish? In the UK the answer is no for outdoor ponds, except in very temporary, controlled summer conditions, because they are not cold-water fish and cannot tolerate prolonged drops in temperature. Good betta fish care temperature management is essential year-round, especially during cooler months.
Wild bettas feed on insect larvae, small crustaceans, and other meaty prey, which explains their protein-rich betta fish diet in aquariums. Their body shape, upturned mouth, and top-dwelling behaviour all suit feeding from the water surface. A natural-style aquarium can be very effective, and many hobbyists enjoy a betta fish tank natural look with wood, almond leaves, and live plants. A halfmoon betta in a planted tank often shows calmer behaviour and richer colour because the fish feels secure.
Mimicking the natural habitat improves colour, appetite, and confidence. In practice, that means warm water, low flow, shaded areas, and plants that create visual barriers. Bettas that can rest near the surface and retreat behind leaves usually flare less from stress and feed more consistently.
The best betta fish tank setup starts with stability, not decoration. Although this species is often sold for bowls, the realistic betta fish minimum tank size for a male is 20 litres, and many keepers get better results in 25-40 litres. A larger volume keeps temperature and water chemistry more stable, gives room for planting, and makes maintenance easier. In practical terms, treat 20 litres as the floor and aim for 30 litres or more for a show Halfmoon.
For a display male, a 20-litre aquarium is the baseline, but 25-30 litres gives more consistent water quality and more room for a proper betta fish nano tank setup. Long-finned males do not need huge tanks, but they do need enough footprint to patrol, explore, and avoid constant visual stress. A bowl cannot hold a stable betta fish bowl temperature or run safe filtration, and betta fish bowl water temperature fluctuates too quickly in normal homes. That is one reason a heated, filtered aquarium is strongly preferred over keeping a betta fish at room temperature.
The recommended betta fish temperature range is 24-30°C, with 25-27°C being a reliable day-to-day target for most males. For routine care, around 26°C is ideal. The betta fish best temperature for appetite, immunity, and activity sits near 26°C, and both the betta fish preferred temperature and betta fish preferred water temperature stay in that same warm tropical zone, so the safest betta fish temperature celsius figure is normally 25-27°C. Keep pH between 6.0 and 7.5, and hardness around 2-15 dGH. These are sensible betta fish water parameters for captive-bred stock in the UK.
Many beginners worry about betta fish temperature in winter. In the UK, room temperatures often fall below the safe range, so a reliable betta fish heater is not optional. Use a guard if needed and pair it with a thermometer. The correct betta fish heater temperature setting is usually 25-26°C. When comparing temperature guides online, avoid extremes and focus on consistency, because sudden swings can cause betta fish temperature shock even when the final temperature is technically acceptable.
A sponge filter or low-flow internal filter works best. Halfmoon males have large fins, so strong current causes fatigue and can reduce feeding response. A calm surface is ideal, but there should still be enough movement to maintain oxygen exchange. If you are building a beginner-friendly setup, combine a small sponge filter with a dependable betta fish water heater for steady conditions.
Dark sand or fine gravel helps the fish feel secure and makes the butterfly pattern stand out. For a planted display, use broad-leaved species and floating cover. Bettas love resting on leaves and under shade. A betta tank with live plants is often easier to maintain than people expect, and it supports a healthier micro-ecosystem. You can also take inspiration from halfmoon betta tank ideas that combine driftwood, Indian almond leaves, and soft planting.
For related betta varieties, compare this fish with the Stunning Halfmoon Male Splend Beautiful Betta, the STUNNING SUPER RED HALFMOON BETTA Male, the Stunning Half Moon Male Green Betta, or the Stunning Vailtail Green Male Betta Splend if you prefer a different tail type or colour profile.
Always cycle the tank for 4-6 weeks before adding a betta. Stable biological filtration matters more than fancy decoration. A mature tank keeps ammonia and nitrite at zero, which protects delicate fins and supports long-term betta fish health.
The correct betta fish diet is carnivorous and protein-focused. In the wild, bettas hunt insect larvae and tiny invertebrates, so their digestive system is built for meaty foods rather than plant-heavy flakes. A good staple is high-quality siamese fighting fish food in small floating pellets designed for bettas. These should be the core of the daily diet, supported by frozen or live treats such as bloodworms, brine shrimp, and daphnia.
Feed 2 small meals per day, offering only what the fish can eat in around 30-60 seconds. For most adult males, that means 2-4 small pellets in the morning and 2-4 in the evening, depending on pellet size. This avoids bloating and keeps water quality stable. Warm water around 26°C also makes digestion more efficient than cool water.
Frozen bloodworms and brine shrimp are excellent 2-3 times per week. Daphnia is useful for variety and can help if a fish seems slightly constipated. During conditioning for betta fish breeding, richer foods can improve body condition, but avoid overdoing it.
| Time | Food | Amount |
|---|---|---|
| Morning | Betta pellets | 2-4 small pellets |
| Evening | Betta pellets or frozen food | 2-4 pellets or a small pinch |
Heating matters at feeding time because cold fish eat poorly. A stable betta fish temperature heater setup supports appetite, while low temperatures slow digestion; aim for a betta fish tank heater temperature around 26°C. Owners asking how to heat a betta tank without a heater should know there is no reliable substitute in a typical UK home. A mini heater for fish bowl is not a real solution if the bowl itself is too small to hold stable conditions, and a betta fish heater 1 gallon approach should never be treated as a care standard. Focus on the right aquarium and the right heater, not the smallest possible container.
Overfeeding is one of the fastest ways to foul a betta tank. Uneaten food raises ammonia, stresses the fish, and can trigger fin problems. A slightly hungry betta is safer than a constantly overfed one.
This fish combines two highly desirable traits: the broad Halfmoon tail and the butterfly colour pattern. A quality male opens the caudal fin close to 180 degrees when flaring, creating a near semicircle. The butterfly pattern usually shows a stronger body colour with a contrasting lighter or translucent band toward the outer fins. If you are researching betta fish colour (often searched as betta fish color), this is one of the most visually dramatic combinations available in the hobby.
Adult size is usually around 6-7 cm body length, though the finnage makes the fish appear larger. The body is streamlined, the mouth is slightly upturned, and the finnage is intentionally exaggerated through selective breeding. Good lighting and dark substrate can increase contrast, while a calm, planted setup helps prevent fin wear. Keepers searching for a rainbow betta are usually looking for multicolour or iridescent strains; butterfly bettas offer a cleaner, more defined pattern rather than a random rainbow mix.
Sexing is usually straightforward. Males have longer fins, stronger displays, and more intense territorial behaviour. Females can also be colourful, but they are usually shorter-finned and less dramatic in profile. Related forms worth comparing include the STUNNING Double Tail Male SPLEND BEAUTIFUL FISH and the STUNNING KOI NEMO BETTA Male Betta, which offer very different visual styles.
A male Halfmoon Butterfly Betta is best treated as a territorial centrepiece fish, and a sensible betta fish community tank guide starts with that reality. These males should never be kept with other male bettas, and they may react badly to fish with flowing fins, bright colours, or fin-nipping habits. When customers ask what are betta fish tank mates, the answer is not “anything peaceful.” Tank mate choice depends on tank size, layout, and the individual fish’s temperament.
In larger, well-structured aquariums, suitable peaceful tank mates for betta can include small Corydoras species, Kuhli loaches, some snails, and shrimp with caution. Bettas often ignore bottom-dwellers because they occupy different levels. For a solo display in 20-30 litres, a snail is often the safest companion. In a bigger setup, weigh up betta fish tank mates 10 gallon options versus a betta fish tank mates 15 gallon layout; the extra space in a 15-gallon aquarium gives far more room for visual separation and reduces stress.
This fish is not the best choice for a busy mixed tank with guppies, tiger barbs, or other fin nippers. Those species either provoke aggression or damage the long fins. If you are specifically researching halfmoon betta tank mates, choose calm, non-flashy species and provide heavy planting. A halfmoon betta in a planted tank with line-of-sight breaks gives the best chance of success.
| Species | Compatible? | Notes |
|---|---|---|
| Corydoras | ✅ Yes | Peaceful bottom dwellers; best in larger tanks with soft flow |
| Kuhli Loach | ✅ Yes | Shy and bottom-oriented; provide hiding spots |
| Shrimp | ⚠️ Caution | Some bettas ignore them; others hunt them |
| Snails | ✅ Yes | Usually safe and useful for cleanup |
| Other male bettas | ❌ Avoid | High risk of serious fighting |
| Guppies (males) | ❌ Avoid | Flowing fins can trigger aggression |
Female bettas and sororities are a separate topic from keeping a single male like this one. While some experienced keepers attempt all-female setups, they are not beginner projects: females can also be territorial and aggressive, so success requires plenty of space, the right group size, and careful observation. If you are weighing up a female project, research it on its own terms rather than mixing a female group with a display male.
If you want to compare male and female options, see the Stunning Halfmoon Female Betta Splend Beautiful or the Female Super Delta Top Grade. If you are choosing a male for a species-only display, the Stunning Halfmoon Male Splend Beautiful Betta and STUNNING SUPER RED HALFMOON BETTA Male are useful alternatives to compare.
Always quarantine new arrivals for 2-4 weeks before adding them to a betta setup. This protects your display fish from parasites and gives you time to assess whether a potential companion is calm enough for a territorial male.
Betta fish breeding is moderate in difficulty and should only be attempted with conditioned, healthy fish and a clear plan for raising fry. This listing is for a male, so breeding requires a compatible female and separate conditioning tanks. The ideal betta fish temperature for breeding is usually around 27-28°C, and the betta fish breeding water temperature should be stable, not fluctuating. A shallow breeding tank with a lid, gentle heating, and minimal current works best.
A 20-30 litre breeding tank is suitable, filled shallowly to help the male manage the bubble nest and retrieve eggs. The male betta fish temperature and male betta fish water temperature should be kept stable before spawning, and the female should be conditioned just as carefully. When preparing broodstock, female-specific care, tank setup, tank size, and temperature all matter as much as the male’s condition.
The male builds a bubble nest at the surface, often under floating leaves or a small piece of cover. A receptive female may show vertical breeding stripes and a rounded body, along with visible interest in the male and an obvious ovipositor. The pair embraces under the nest, and the male collects and places the eggs.
After spawning, remove the female. The male tends the nest until hatching. The correct betta fish fry temperature remains warm and stable, usually around 27-28°C, with a humid air layer under the lid to support labyrinth organ development. Once fry become free-swimming, remove the male and begin feeding infusoria, then microworms or newly hatched brine shrimp. The betta fish breeding temperature should never swing sharply during this stage.
Egg-eating and failed spawns usually come down to readiness, stress, or poor pairing. Use mature fish, condition them well, and avoid rushing the process.
Condition both fish for 10-14 days with small, frequent protein-rich meals before introduction. Use floating plants or almond leaf cover to anchor the bubble nest, and keep the breeding tank shallow to improve egg recovery and early fry survival.
Choosing between betta varieties often comes down to tail shape, colour preference, and how much finnage you want to manage. The Halfmoon Butterfly Betta is ideal for keepers who want a dramatic display fish with crisp fin edging and elegant movement. Compared with shorter-finned forms, it is more ornamental but may need calmer flow and extra attention to fin condition.
| Feature | Halfmoon Butterfly Betta Male | Veiltail Male Betta |
|---|---|---|
| Max Size | About 7 cm | About 6-7 cm |
| Care Level | Easy | Easy |
| Temperature | 24-30°C | 24-30°C |
| Best For | Show display and planted nano tanks | Beginner-friendly classic betta look |
| Feature | Halfmoon Butterfly Betta Male | Koi Nemo Betta Male |
|---|---|---|
| Pattern | Defined butterfly edge | Marbled, variable koi pattern |
| Visual Style | Elegant and symmetrical | Bold and unpredictable |
| Flow Tolerance | Prefers very gentle flow | Also prefers gentle flow |
| Best For | Keepers wanting clean fin contrast | Keepers wanting unique patterning |
If you want a classic long-finned display fish, choose this Halfmoon Butterfly. If you prefer a simpler tail line, compare with the Stunning Vailtail Green Male Betta Splend — the ideal veiltail betta fish water temperature is the same 24-30°C tropical range. If you want a more unusual colour pattern, look at the STUNNING KOI NEMO BETTA Male Betta. For a richer solid-colour look, the Stunning Half Moon Male Green Betta or STUNNING SUPER RED HALFMOON BETTA Male may suit you better.
Whichever form you choose, the same fundamentals apply: stable betta fish care guide principles, warm water, low current, and a proper heater. For routine care, a steady 25-27°C is the temperature to aim for.
Strong betta fish health starts with temperature stability, clean water, and sensible feeding. A healthy male is alert, responsive, interested in food, and able to hold his fins well without clamping. The body should look full but not bloated, the eyes clear, and the scales smooth. Because this is a long-finned strain, torn fins, stress from excessive current, and poor water quality are more common than in short-finned bettas.
Bettas are very sensitive to temperature. They are tropical fish, and prolonged cold suppresses immunity and appetite. Survival in cold water is not the same as thriving: chilling can quickly lead to lethargy, constipation, and disease. Common betta fish temperature shock symptoms (sometimes searched as betta temperature shock symptoms) include clamped fins, sudden inactivity, loss of appetite, pale colour, darting, or lying on the bottom. You may also see these signs after a rapid water change or transport if the fish is moved too quickly between temperatures.
A betta fish water temperature too hot for the species is just as risky. Above the normal tropical range it can speed metabolism, reduce dissolved oxygen, and increase stress, causing rapid gill movement and frantic behaviour. The maximum temperature for betta fish should never be treated as a target; anything in the high 80s or 90s Fahrenheit is too warm for routine care and should be corrected gradually. Stay in the mid-20s Celsius and avoid sudden swings.
Poor water quality can lead to fin rot, bacterial infections, and stress-related illness. Keep ammonia and nitrite at zero and nitrate low through regular maintenance. A separate betta fish quarantine tank is strongly recommended for observation and treatment, and its temperature should closely match the main tank to avoid additional stress. Customers also ask about spring water for bettas; unless you know its chemistry, it is safer to use conditioned tap water with a reliable water conditioner.
Never make sudden temperature corrections. If a tank is too cold or too warm, adjust gradually over several hours. Rapid changes can trigger temperature shock even when moving toward the correct range.
This fish is intelligent, observant, and strongly aware of its surroundings. Most males patrol the upper half of the tank, inspect new objects, and quickly learn feeding routines. They are solitary by nature, and a male often flares at reflections or nearby fish with similar shape and colour. That display behaviour is normal, but constant stress from mirrors, bright rivals, or poor layout should be avoided.
Because of the labyrinth organ, bettas regularly visit the surface to breathe. That is why lids, warm air above the waterline, and floating cover matter. A secure, planted setup encourages natural exploration. In a calm aquarium, you will often see the fish rest on leaves, investigate feeding tools, and respond to people outside the glass. This interactive personality is one reason many hobbyists consider them among the best betta fish for beginners, provided the keeper understands heating and territorial behaviour.
If you are researching betta optimal conditions or how to take care of a betta fish for beginners, focus on a stable routine: warm water, low current, regular feeding, and weekly maintenance. Bettas are not difficult, but they are less forgiving of neglect than their reputation suggests.
When you buy betta fish UK, condition and handling matter more than flashy wording. Our Halfmoon Butterfly Betta males are selected for finnage quality, colour contrast, alert behaviour, and overall body condition. Before dispatch, each fish is checked for posture, feeding response, fin integrity, and obvious signs of stress. This is especially important for long-finned males, where transport quality and pre-shipping condition directly affect how well the fish settles into a new home.
For customers searching betta fish for sale UK, buy betta fish online UK, siamese fighting fish for sale, buy halfmoon betta UK, halfmoon betta for sale UK, order halfmoon betta online UK, male betta for sale UK, live betta fish for sale UK, or fighter fish for sale UK, the key difference is preparation. Fish are packed in insulated boxes with appropriate seasonal protection, including heat packs in winter when needed. Our betta fish delivery UK process is designed to reduce temperature fluctuation and transit stress, which is vital for tropical labyrinth fish.
We also know that many buyers compare halfmoon betta price UK across listings. Price only makes sense when paired with condition, packing quality, and realistic care advice. A healthy fish that has been fed properly, held at the correct betta fish aquarium water temperature, and shipped with care is far better value than a cheaper fish that arrives stressed. If you need help choosing between strains, compare this fish with the Stunning Halfmoon Male Splend Beautiful Betta, STUNNING SUPER RED HALFMOON BETTA Male, Stunning Half Moon Male Green Betta, or the female options linked above for separate setups.
Order your Halfmoon Butterfly Betta Male today with confidence if you are ready to provide a heated, cycled aquarium and the correct tropical care.
If you are planning a full display, compare this fish with the Stunning Halfmoon Female Betta Splend Beautiful for separate female projects, the STUNNING KOI NEMO BETTA Male Betta for a marbled colour style, or the Stunning Vailtail Green Male Betta Splend if you prefer a classic tail shape. For bolder solid colour, the STUNNING SUPER RED HALFMOON BETTA Male is a strong alternative. If your goal is a display collection, the STUNNING Double Tail Male SPLEND BEAUTIFUL FISH offers a very different silhouette. These related bettas help you compare finnage, pattern, and how each strain suits your preferred aquascape.
24–30°C · pH 6–7.5 · 20L
24–30°C · pH 6–7.5 · 20L
24–30°C · pH 6–7.5 · 20L
24–30°C · pH 6–7.5 · 20L
24–30°C · pH 6–7.5 · 20L
24–30°C · pH 6–8 · 20L
18–26°C · pH 6.5–8 · 30L
23–27°C · pH 7.4–8.4 · 500L
20–27°C · pH 6–7 · 54L
23–27°C · pH 7.4–8.4 · 150L
24–28°C · pH 6.5–7.8 · 300L
20–24°C · pH 7–8 · 45L
24–28°C · pH 6.5–7.5 · 2000L
24–28°C · pH 7.5–8.5 · 200L
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18–25°C · pH 6–8 · 100L
24–28°C · pH 7–8 · 120L
18–28°C · pH 6.5–8 · 20L
24–27°C · pH 7.5–8.8 · 150L
22–26°C · pH 6–7.5 · 60L
24–28°C · pH 7.5–8.5 · 40L
24–28°C · pH 7.5–8.5 · 500L