

Betta splendens
Halfmoon Female Betta (Female Betta Fish) - UK
Beautiful halfmoon female betta with flowing fins and vibrant colour. Ideal for moderate-care tropical setups. Buy online today with UK delivery.
Care at a Glance
Premium Quality
Healthy, vibrant fish from trusted suppliers
Expert Care
Detailed care guides and support
Live Arrival Guarantee
Your fish arrives healthy or we'll replace it
Acclimated
Properly quarantined and ready for your tank
Quick Care Guide
Water Parameters
Maintain these water conditions for optimal health and vibrant colors
Why Choose This Fish?
Beautiful halfmoon female betta with flowing fins and vibrant colour. Ideal for moderate-care tropical setups. Buy online today with UK delivery.
The Halfmoon Female Betta is one of the best examples of how elegant a small tropical fish can be. This form of Betta splendens combines the hardy nature that makes bettas popular with softer lines, rich colour, and a more community-friendly profile than many males. If you are researching betta fish temperature, this is exactly the kind of fish where getting heat right makes a visible difference: stronger appetite, better finnage, brighter colour, and calmer behaviour. In practical terms, the best temperature for betta fish is usually 25-28°C, with a safe betta fish temperature range of 24-30°C. That means betta fish at room temperature in most UK homes is not ideal for long-term care.
Female Halfmoons stay around 7 cm, usually live about 3 years with good care, and are considered easy to moderate depending on the setup. They come from warm, shallow waters in Thailand and wider Southeast Asia, so stable betta fish water temperature, gentle flow, and access to the surface are all part of their basic betta fish aquarium requirements. Many customers choose them because they want the personality of a Siamese fighter without the extreme finnage and territorial intensity of some males. See our detailed photos showing body shape, fin spread, and betta fish color variation in this female form. If you want a striking centrepiece fish for a small planted aquarium, this female betta offers beauty, character, and manageable betta fish care in one package.
🔹 Quick Facts
- Scientific Name: Betta splendens
- Care Level: Easy
- Min Tank Size: 20 litres (about 5.3 gallons)
- Temperature: 24-30°C (75-86°F)
- pH Range: 6.0-7.5
- Lifespan: Up to 3 years
- Temperament: Semi-aggressive to aggressive
- Diet: Carnivore
Classification
- Order: Anabantiformes
- Family: Osphronemidae
- Genus: Betta
Betta splendens is the classic Siamese fighting fish kept in home aquariums worldwide. It belongs to the labyrinth fish group, meaning it can breathe atmospheric air from the surface using a specialised organ. In the hobby, female Halfmoons are valued for their rounded finnage, strong colour, and flexibility in carefully planned tanks. Related bettas in the same family include plakats, super deltas, butterfly bettas, and alien hybrids.
Where Do Halfmoon Female Bettas Come From? Natural Habitat Explained
The natural betta fish habitat of Betta splendens is warm, slow-moving freshwater across Thailand and nearby parts of Southeast Asia. In the wild, these fish are found in rice paddies, drainage ditches, floodplains, canals, and shallow vegetated margins rather than fast-flowing rivers. That matters because the ideal betta fish habitat temperature is consistently warm, and the fish is adapted to still or gently moving water with dense cover.
When aquarists ask whether are betta fish pond fish, the answer is usually no for the UK climate. They are tropical fish, not cool-water pond fish, and they need reliable heating indoors. Their natural environment helps explain why betta fish tank natural layouts work so well: dark substrate, floating plants, root cover, and calm surface zones. A good betta fish tank habitat should feel sheltered rather than open and bright.
Wild bettas feed on insect larvae, tiny crustaceans, and other protein-rich prey. That is why a carnivorous betta fish diet is important in captivity. They are also labyrinth fish, so they regularly rise to the surface for air. Any betta fish tank ecosystem built for them must leave open surface access even if the tank is heavily planted. A lid is useful too, because bettas can jump.
For keepers building a calm display, betta fish with live plants is one of the best combinations in the hobby. A halfmoon betta in planted tank conditions often shows better confidence and richer colour than one in a bare setup. Many beginners also ask where do female betta fish poop from; like other fish, waste exits through the vent near the anal fin area. Normal waste, regular feeding, and stable water all help you judge health.
💡 Expert Tip
Mimicking the natural habitat improves health and behaviour. Warm water at 25-28°C, dimmer lighting, floating cover, and gentle filtration usually produce a calmer fish with better appetite and more confident swimming.
How Do You Set Up the Perfect Tank for a Halfmoon Female Betta?
The first question most keepers ask is what size fish tank do i need for a betta. The true betta fish minimum tank size for a single female is 20 litres, and that is also a sensible betta fish tank size minimum for stable heating and filtration. While some people search for a betta fish nano tank setup, very small tanks are harder to keep stable, especially for betta fish temperature in winter. A 25-40 litre aquarium is easier to manage and gives more room for plants and decor.
In terms of betta fish tank size, bigger is usually better as long as flow stays gentle. The right betta fish tank size requirement is not just about swimming room; it is about thermal stability, easier cycling, and reduced waste concentration. If you are wondering what size betta fish tank works best for a beginner, 25 litres with a lid, heater, sponge filter, and live plants is the sweet spot.
Tank Size Requirements
A single female Halfmoon can live comfortably in 20 litres, but 25 litres or more is recommended. For a sorority, the female betta fish tank size should be much larger, usually 75 litres or more with heavy planting and multiple hiding zones. If you compare betta fish temperature vs size, larger tanks hold a more stable temperature and reduce the risk of sudden changes.
Water Parameters
The key parameter is betta fish temperature. The betta fish best temperature is 25-28°C, and many keepers use 26°C as a dependable target. If you are asking what temperature should betta fish tank be, aim for 26°C unless you are breeding or treating a specific issue. The normal temperature for betta fish in celsius is therefore mid to upper 20s, and the common betta fish temperature celsius recommendation is 25-28°C.
The betta fish aquarium water temperature should stay steady day and night. Are betta fish sensitive to temperature? Yes, very much so. Rapid swings can lead to stress, lethargy, poor digestion, and betta fish temperature shock. If the betta fish water temperature too hot rises above 30°C for long periods, oxygen levels drop and metabolism speeds up too far. The maximum temperature for betta fish is around 30°C for routine care, with anything near betta 90 degree water being dangerous.
pH should sit between 6.0 and 7.5. If customers ask about betta fish ph level, the practical answer is that stability matters more than chasing an exact number. Hardness of 2-15 dGH is acceptable. Use dechlorinated water; spring water for betta fish can work only if you know the mineral content, but most keepers are better off using conditioned tap water with a reliable betta fish water conditioner.
Filtration
A sponge filter or very gentle internal filter is ideal. Female bettas do not enjoy strong current, especially Halfmoon forms with broader finnage. Pair the tank with a reliable betta fish heater or betta fish water heater and always verify the betta fish heater temperature with a thermometer. A preset heater can work in warm rooms, but an adjustable unit gives better control over betta fish heater temp and betta fish tank heater temperature.
Searches like betta fish heater walmart, betta fish heater 1 gallon, or mini heater for fish bowl often come from people trying to heat tiny containers. In practice, bowls and ultra-small tanks are poor choices because betta fish bowl temperature and betta fish bowl water temperature swing too quickly. If you need to know how to heat a betta tank without a heater, the honest answer is that you should not rely on room heat alone in the UK except very temporarily.
Substrate, Plants & Decor
Fine dark gravel or sand works well and helps colours stand out. Add driftwood, caves, and broad-leaved plants for resting spots. Good choices include Anubias, Java fern, Cryptocoryne, floating Salvinia, and Amazon frogbit. For customers wanting halfmoon betta tank ideas, think layered planting with one open feeding area and several quiet corners. A tasteful halfmoon betta aquarium decoration scheme should avoid sharp plastic that can tear fins.
If you enjoy comparing forms, the calm, warm setup used for a female Halfmoon is also suitable for Female Super Delta Top Grade, STUNNING SUPER DELTA BETTA Female Betta, STUNNING Mix Plaket BETTA Female, and Stunning Double Tail Female Betta Splend. Keep the surface accessible and use a lid to hold warmth and humidity above the waterline, which supports the labyrinth organ.
🔹 Quick Setup Checklist
- 20 litres minimum, 25 litres preferred for one female
- Adjustable heater set to 25-28°C
- Gentle sponge or low-flow filter
- Dark substrate and smooth decor
- Live plants plus floating cover
- Lid fitted to reduce jumping and heat loss
- Fully cycled tank before stocking
💡 Pro Tip
Always cycle the tank for 4-6 weeks before adding your betta. The most common beginner mistake is putting a fish into warm but uncycled water, which causes ammonia stress even when the temperature looks correct.
What Do Halfmoon Female Bettas Eat? Complete Feeding Guide
The correct betta fish diet is high in protein. In nature, bettas hunt insect larvae and tiny aquatic invertebrates, so they do best on quality betta pellets backed up with frozen or live foods. If you are asking what do female betta fish eat, the answer is small carnivorous foods designed for surface-feeding tropical fish. A balanced female betta fish diet should include staple pellets plus bloodworms, brine shrimp, and daphnia in rotation.
For beginners wondering what to feed female betta fish, choose a dedicated pellet as the staple and use treats 2-3 times per week. Good siamese fighting fish food should sink slowly or float briefly so the fish can feed naturally. Feed once or twice daily, only what is eaten in around 30-60 seconds. Bettas have small stomachs, so overfeeding is easy.
If you notice why is my female betta fish not eating, check temperature first. Low heat slows digestion and appetite. The fish may also be stressed by current, poor water quality, or a recent move. This is one reason betta fish heat temp and feeding are closely linked. A fish kept below the ideal betta fish desired temperature often appears sluggish and ignores food.
Some searches combine heating and feeding, such as betta fish temperature heater or betta fish temperature vs heat. In practice, the relationship is simple: proper warmth supports metabolism, but overheating causes stress. Use an accurate heater and thermometer rather than guessing by touch. Female bettas do not need large meals; they need consistency.
| Time | Food | Amount |
|---|---|---|
| Morning | Betta pellet | 2-3 small pellets |
| Evening | Pellets or frozen daphnia/brine shrimp | 2-3 pellets or a small pinch |
Conditioning for betta fish breeding usually means richer foods like frozen bloodworm and brine shrimp. This improves body condition and egg production. Keep one fasting day per week to reduce bloating.
⚠️ Feeding Warning
Overfeeding causes constipation, bloating, and ammonia spikes. Bettas often beg for food, but that does not mean they need more. Small, measured portions are safer than one large meal.
What Does a Halfmoon Female Betta Look Like? Colors, Patterns & Varieties
The Halfmoon Female Betta has a laterally compressed body, upturned mouth, and elegant fins that spread wider than many standard females, though usually not as dramatically as a top male Halfmoon. Adult size is around 7 cm. The tail can show a broad semicircular spread, while the dorsal and anal fins give the fish a balanced, flowing silhouette.
Customers often ask what color are female betta fish. The answer is: almost any colour seen in the species, though individual intensity varies. Females may be red, blue, turquoise, steel, lavender, marble, cellophane, mustard gas, or multicolour. Some hobbyists search for a rainbow betta fish look, meaning a fish that shifts between several tones under different light. Others notice terms like betta fish temperature yellow in forums, but yellowing is not a temperature target; it is usually a colour trait or a stress-related change depending on context.
If you are reading betta fish temperature reddit threads and seeing conflicting advice, remember that colour and finnage look best when the fish is warm, unstressed, and well fed. Good lighting, dark substrate, and live plants all improve visual contrast. Our photos show the variation you can expect from randomly selected stock while still maintaining the graceful Halfmoon female form.
For comparison, Blue Alien Hybrid Betta Female - offers a more metallic, scaled appearance, while Stunning Double Tail Female Betta Splend has a very different tail structure. If you prefer the classic broad-fin look, this Halfmoon female remains one of the most attractive options.
What Fish Can Live With a Halfmoon Female Betta? Compatibility Guide
A proper betta fish community tank guide starts with temperament. Female bettas are often described as milder than males, but that does not mean every fish is safe with them. Are female betta fish aggressive? They can be. Are female betta fish less aggressive than males? Usually yes, but each fish has its own personality. Are female betta fish aggressive to other fish? Sometimes, especially if tank mates are flashy, fin-nippy, or occupy the same upper zone.
Many people ask what are betta fish tank mates and what can female betta fish live with. In a well-planted tank, the safest options are peaceful bottom dwellers and calm invertebrates. Good choices include Corydoras, Kuhli loaches, and snails. Shrimp can work, but there is always a risk of predation. If you want peaceful tank mates for betta, choose species that ignore the betta and do not resemble another betta.
What fish are compatible with female betta fish in a modest community? Small Corydoras species are excellent because they stay low in the tank. Kuhli loaches are another good option in larger, mature setups with soft substrate. Nerite or mystery snails are usually safe. Avoid tiger barbs, serpae tetras, male guppies, and other fin nippers.
Questions about sororities are common too: 2 female betta fish together, 2 female betta fish live together, 3 female betta fish together, and even odd searches like what day female betta fish together or what time female betta fish live together. In reality, sororities are advanced setups, not simple beginner projects. Two or three females often leads to unstable hierarchy and bullying. If attempting one, keep 5+ females in a larger, heavily planted tank with sight breaks. Even then, success is not guaranteed.
Are female betta fish social? Not in the same way shoaling fish are. They tolerate others under the right conditions, but they do not need company from their own species. Are female betta fish more aggressive than males? Usually no, though some individuals can be exceptionally dominant. The safest route for most keepers is one female per tank or one female in a carefully chosen community.
| Species | Compatible? | Notes |
|---|---|---|
| Stunning Double Tail Female Betta Splend | ⚠️ Caution | Only in advanced sorority setups with space and heavy planting |
| Corydoras | ✅ Yes | Peaceful bottom dwellers, good for larger planted tanks |
| Tiger Barbs | ❌ Avoid | Fin nippers that stress bettas and damage fins |
If you are comparing forms for mixed displays, Female Super Delta Top Grade, STUNNING SUPER DELTA BETTA Female Betta, and Blue Alien Hybrid Betta Female - have similar compatibility limits. Halfmoon betta tank mates should always be chosen with caution because finnage attracts nippers.
💡 Compatibility Tip
Always quarantine new arrivals for 2-4 weeks before adding them to a betta tank. This reduces disease risk and lets you assess behaviour before introducing a territorial fish to a community.
How Do You Breed a Halfmoon Female Betta? Complete Breeding Guide
Betta fish breeding is moderate in difficulty and should only be attempted with conditioned, mature fish. If you are looking for a practical female betta fish guide, start by identifying a healthy adult female with good body weight, active movement, and no fin damage. Female betta fish how to tell breeding readiness often comes down to behaviour and appearance: many females show a visible ovipositor and may display female betta fish breeding stripes when receptive.
The breeding tank should be shallow, calm, and warm. The ideal betta fish temperature for breeding is usually 27-28°C. This is also a sensible betta fish breeding temperature and betta fish breeding water temperature for encouraging spawning behaviour. Keep the water level low, add floating cover, and use minimal flow. The female betta fish temperature and male betta fish temperature should match before introduction to avoid stress.
Condition both fish with rich foods for 1-2 weeks. The female betta fish size for breeding should be mature and well rounded, not undersized. Once introduced under supervision, the male will usually build a bubble nest. The female may approach, display bars or stripes, and eventually spawn under the nest. After egg release, the male gathers eggs while the female should usually be removed to prevent fighting. This also answers a common question: why do female betta fish eat their eggs? Stress, inexperience, or poor timing can trigger egg eating in captive setups.
Eggs hatch quickly, often within 24-36 hours depending on warmth. Newly hatched fry remain in the nest briefly before becoming free swimming. The betta fish fry temperature should stay stable around 27-28°C, and humidity above the water should remain warm as the labyrinth organ develops. Feed infusoria or commercial fry food first, then move to baby brine shrimp as they grow.
For keepers comparing sexes, male betta fish water temperature is not different in normal care, but breeding setups are more controlled. If you are wondering what are female betta fish called, they are simply female bettas; unlike livebearers, there is no special separate common name.
Advanced Breeding Tip
Use a removable divider at first so the pair can see each other without immediate contact. This lets you confirm readiness and reduces injuries during the introduction phase.
How Does a Halfmoon Female Betta Compare to Similar Bettas?
Choosing between female betta forms matters because finnage, aggression, and display style can vary a lot. If you want a graceful fish with broad fins but slightly less drag than a full male Halfmoon, the female Halfmoon is a strong middle ground. It is ideal for keepers who want colour and personality in a smaller display without the extreme territorial behaviour often seen in males.
| Feature | Halfmoon Female Betta | Halfmoon Male Betta |
|---|---|---|
| Max Size | About 7 cm | About 7 cm |
| Care Level | Easy | Easy |
| Temperature | 24-30°C | 24-30°C |
| Price | £5.81 | Varies |
| Best For | Planted nano or calm community | Single-specimen display tank |
| Feature | Halfmoon Female Betta | Alien Female Betta |
|---|---|---|
| Body Style | Classic domestic betta shape | More metallic, wild-type influence |
| Colour Effect | Broad range of solid and marble colours | Iridescent green/blue metallic sheen |
| Temperature | 24-30°C | Similar; compare alien betta fish temperature needs carefully |
| Price | £5.81 | Usually higher |
| Best For | Classic betta look | Collectors wanting unusual patterning |
If you want a traditional display fish, choose this female Halfmoon. If you prefer more metallic patterning, consider the Blue Alien Hybrid Betta Female -. If you want the broadest possible fins and a solo display fish, compare with Halfmoon Butterfly Betta Male Betta Splendens or Stunning Halfmoon Male Splend Beautiful Betta. Keep in mind that veiltail betta fish water temperature and Halfmoon care are similar, so your choice is mostly about appearance and temperament rather than basic heat needs.
What Are the Common Health Problems in a Halfmoon Female Betta?
Good betta fish health starts with warm, stable water and low stress. A healthy female is alert, eats eagerly, rests normally, and shows smooth breathing at the surface or midwater. Fins should be open rather than clamped, and the body should look full but not bloated. If you are asking which betta fish temperature is best, the answer remains 25-28°C for routine care.
One of the most common issues is betta fish temperature shock. Rapid changes during water changes, shipping, or moving tanks can cause lethargy, loss of balance, clamped fins, and refusal to eat. Typical betta fish temperature shock symptoms include sudden inactivity, hanging near the heater, pale colour, and stress breathing. You may also see the same signs described as betta temperature shock symptoms in care forums. If you are wondering which betta fish temperature shock events are most dangerous, sudden drops are usually worse than stable but slightly cool water.
People often ask how long can betta fish live in cold water. The honest answer is: not well for long. A betta may survive temporary low temperatures, but digestion, immunity, and activity all decline. This is why betta fish room temperature is unreliable in the UK, especially overnight or in winter. Another common question is how long does it take for water to get to room temperature for betta fish; while water may equalise within hours, room temperature itself is usually below the ideal which betta fish temperature should be.
Overheating is also a risk. If the betta fish water temperature too hot climbs above 30°C, the fish may gasp, become restless, and age faster over time. Searches like which betta fish temperature range and which betta fish temperature to keep are best answered with one rule: stay steady in the mid to upper 20s, not at the extremes. If you ever suspect betta fish water temperature too hot, increase aeration, dim lights, and cool the room gradually rather than making a sudden change.
Other common problems include fin rot, constipation, ich, and stress-related colour loss. Set up a betta fish quarantine tank for any sick fish or new arrivals. Quarantine should be heated, cycled if possible, and easy to observe. During treatment, avoid unnecessary medications and identify the cause before adding chemicals.
⚠️ Health Warning
Never make abrupt temperature corrections. Raising or lowering water too quickly can worsen shock. Adjust no more than about 1°C at a time unless directed by a specific treatment protocol.
🔹 Quarantine Protocol
- Use a separate heated tank for 2-4 weeks
- Match the main tank temperature before transfer
- Observe appetite, fins, breathing, and waste daily
- Keep decor simple for easy cleaning and monitoring
- Test ammonia and nitrite regularly
What Is Halfmoon Female Betta Behaviour Like in the Aquarium?
Female Halfmoon bettas are intelligent, curious fish that quickly learn feeding times and often recognise movement outside the glass. They usually occupy the top half of the aquarium, weaving through plants and pausing under leaves near the surface. Because they are labyrinth fish, they frequently take gulps of air.
In terms of personality, they are often bold but not constantly aggressive. This is why they are sometimes suggested as the best betta fish for beginners, provided the keeper understands heating and tank setup. A well-kept fish in proper betta fish optimal conditions will explore, flare occasionally, and show strong feeding response without looking frantic.
Many keepers ask how to take care of a betta fish for beginners. The behavioural answer is simple: give the fish warmth, cover, clean water, and routine. If the fish hides all day, clamps fins, or rests on the bottom, review your betta fish care guide starting with temperature, flow, and water quality. Stable betta fish care temperature is one of the biggest factors in normal behaviour.
Why Buy a Halfmoon Female Betta from Tropical Fish Co?
When customers want to buy betta fish UK, they are usually looking for more than colour alone. They want a fish that arrives active, correctly sexed, and already accustomed to proper tropical conditions. Our Halfmoon female bettas are selected for body condition, finnage quality, and overall vigour rather than just flashy colour in a photo. That matters with female bettas because a healthy, well-started fish settles faster and feeds more reliably after shipping.
Before dispatch, each fish is observed for activity, respiration, appetite, and visible fin condition. We do not treat these as ornaments; they are live tropical animals that depend on stable heat. During colder months, packaging is adjusted for betta fish delivery UK conditions using insulated boxes and heat support where required. This is especially important for maintaining safe betta fish water temperature during transit and reducing the risk of betta fish temperature shock on arrival.
If you are searching for betta fish for sale UK, female betta 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, live betta fish for sale UK, or even fighter fish for sale UK, this listing is designed to give you the practical care detail many shops leave out. We also know buyers compare halfmoon betta price UK against quality, and that is why condition and handling standards matter just as much as colour.
For hobbyists building a collection, you can also compare this fish with Halfmoon Butterfly Betta Male Betta Splendens, Stunning Halfmoon Male Splend Beautiful Betta, STUNNING SUPER RED HALFMOON BETTA Male, and Blue Alien Hybrid Betta Female -. Order your Halfmoon Female Betta today with confidence if you want a graceful, warm-water show fish that suits a carefully planned planted aquarium.
Why Choose Tropical Fish Co for Halfmoon Female Bettas
- Selected for active behaviour, clean finnage, and strong body condition rather than random low-grade stock
- Packed with temperature stability in mind, especially important for tropical labyrinth fish in UK weather
- Supported by detailed care guidance on heating, feeding, acclimation, and compatibility
You Might Also Like
If you enjoy the look of this fish, compare it with the Female Super Delta Top Grade for a similar female display betta, or the STUNNING Mix Plaket BETTA Female if you prefer shorter fins and a more athletic shape. For collectors of unusual colours, the Blue Alien Hybrid Betta Female - adds a metallic wild-style twist.
If you want a dramatic solo show fish instead, look at the STUNNING SUPER RED HALFMOON BETTA Male or the Halfmoon Butterfly Betta Male Betta Splendens. For a female with a different tail structure, the Stunning Double Tail Female Betta Splend is also worth considering.
You Might Also Like


Super Red Halfmoon Male Betta (Siamese Fighting Fish) - UK

HMPK Male Betta - UK

Veiltail Green Male Betta - UK

Plakat Snow Dragon Male Betta - UK

Crowntail Female Betta - UK

Double Tail Plakat Koi Male Betta (Siamese Fighting Fish) - UK

Double Tail Plakat Koi Male Betta - UK
Popular Right Now

Yellow Vampire Crab (Geosesarma sp.) - UK

Aulonocara sp. 'Firefish' - Tropical Fish for Sale UK

Yellow Lepturus Cichlid - UK

Apistogramma agassizii “Super Red” - UK

Endler Gold Guppy Breeding (Poecilia wingei) - UK

X Neon Green Rasbora - UK

Rasbora Heteromorpha (Trigonostigma heteromorpha) - UK
