Betta splendens (Yellow Dragon Halfmoon Betta)

19 March 2026

946

The Yellow Dragon Halfmoon Betta is a breathtaking freshwater fish celebrated for its striking contrast. Featuring thick, armor-like white dragon scales across its body and vibrant, sweeping yellow halfmoon fins, this labyrinth fish is a prized centerpiece. Its captivating beauty and bold personality make it a favorite among dedicated aquarists.

Betta splendens (Yellow Dragon Halfmoon Betta)

Overview

The Yellow Dragon Halfmoon Betta is a spectacular designer morph of the traditional Betta splendens. It is highly sought after for its unique combination of traits: the "dragon" scaling, which presents as thick, opaque, metallic white or platinum scales covering the body, and the "halfmoon" tail, which spreads to a full 180-degree angle. The striking contrast between the armored white body and the vivid yellow finnage makes this fish a true living jewel in the home aquarium.

Image of yellow dragon halfmoon betta fish

Distribution and Habitat

While the Yellow Dragon Halfmoon Betta is a product of generations of selective captive breeding and does not exist in the wild, its wild ancestors originate from the Mekong basin in Southeast Asia, primarily in Thailand, Cambodia, and Vietnam. Wild bettas inhabit shallow, sluggish waters such as rice paddies, swamps, and slow-moving streams. These environments are often densely vegetated and low in oxygen, which led to the evolutionary development of their labyrinth organ, allowing them to breathe atmospheric air.

Description of Yellow Dragon Halfmoon Betta

This betta variety is defined by its dramatic finnage and distinct scale mutation. The dragon scale trait gives the fish a heavily armored appearance, while the halfmoon fins create a stunning, sail-like display when the fish flares.

Body shape:

They possess a streamlined, torpedo-shaped body that appears slightly more robust than standard bettas due to the thick, raised nature of the dragon scales.

Color:

The body is covered in opaque, metallic white or platinum "dragon" scales, which sharply contrast with the bright, vibrant yellow coloration of the dorsal, anal, and caudal fins.

Barbels:

Bettas do not possess barbels.

Snout:

They have an upturned mouth (superior mouth), which is perfectly adapted for their natural behavior of feeding on insects at the water's surface.

Eyes:

The eyes are dark and prominent, sometimes partially framed by the thick dragon scaling that extends toward the face.

Fins:

The dorsal, anal, and ventral fins are exceptionally long, flowing, and predominantly bright yellow. The ventral fins often display delicate white tips.

The Tail:

The hallmark of the halfmoon variety is its caudal fin, which spreads into a perfect 180-degree "D" shape when fully flared, characterized by straight, crisp edges.

Temper

Like all Betta splendens, the Yellow Dragon Halfmoon is highly territorial. Males are notoriously aggressive toward other male bettas and will fight, often to the death, if housed together. They can also exhibit aggression toward fish with similar flowing fins or bright colors, mistaking them for rival males.

Sociality

Male bettas should be kept solitary in their own tanks. However, in larger aquariums (15 gallons or more), they can sometimes be kept in a community setting with peaceful, dull-colored, short-finned fish that occupy different water levels, such as bottom-dwelling corydoras or small rasboras. Careful observation is always required when introducing tank mates.

Activity

They are generally active and curious fish, constantly patrolling their territory. However, the heavy finnage of the halfmoon variety can cause them to tire easily. They require plenty of resting spots near the water surface, such as broad leaves or betta hammocks, to lounge and breathe effortlessly.

Keeping and Caring for Yellow Dragon Halfmoon Betta

Caring for a Yellow Dragon Halfmoon Betta requires attention to water quality and habitat structure. Their long, delicate fins are prone to tearing and fin rot if the environment is not properly maintained or if sharp decorations are present.

Tank size:

A minimum tank size of 5 gallons (19 liters) is highly recommended to provide adequate swimming space and stable water parameters.

Water Parameters:

Temperature

They are tropical fish and require a stable heater set between 24-28°C (75-82°F).

pH

The ideal pH range is slightly acidic to neutral, between 6.5 and 7.5.

Hardness

They prefer soft to moderately hard water, ideally between 3 and 4 dGH.

Ammonia, Nitrite, Nitrate

Ammonia and Nitrite must always be at 0 ppm. Nitrates should be kept strictly below 20 ppm through regular water changes.

Lighting

Moderate to low lighting is preferred. Floating plants can be used to diffuse bright aquarium lights and mimic their naturally shaded habitats.

Water flow

Water flow must be kept very low. Strong currents will exhaust a halfmoon betta and can damage their delicate fins. A sponge filter is often the best choice.

Decorations and Plants

Use only live plants (like Anubias or Java Fern) or silk plants. Avoid plastic plants or rough rocks that can snag and tear their fins. Provide hiding caves and resting places near the surface.

Diet

Bettas are primarily carnivorous. Their diet should consist of high-quality, protein-rich betta pellets or flakes. This should be supplemented with frozen or live foods such as bloodworms, daphnia, and brine shrimp to ensure optimal health and vibrant coloration.

Some Feeding Tips

Feed small amounts 1 to 2 times daily—only what they can consume in a couple of minutes (usually 2-3 pellets per feeding). Bettas are prone to bloating and constipation, so a fasting day once a week is highly recommended.

Breeding

Breeding bettas is a complex process that requires a separate breeding tank and dedicated conditioning of the male and female. The male builds a bubble nest at the water's surface. Once the female releases eggs during an elaborate "embrace," the male fertilizes them, catches them in his mouth, and places them in the nest. The female must be removed immediately after spawning to prevent the male from attacking her. The male will fiercely guard the nest until the fry become free-swimming.

Conclusion

The Yellow Dragon Halfmoon Betta is a spectacular specimen that brings a splash of brilliant yellow and striking metallic white to any appropriately sized aquarium. While their long fins require a bit of extra care regarding water flow and tank decor, their engaging personalities and undeniable beauty make them one of the most rewarding fish for both beginners and experienced aquarists alike.

Fish info

Care level: Easy - Moderate
Temperament: Semi-aggressive
Adult size: 5-7 cm
Life expectancy: 3-5 years
Fish type: Labyrinth Fish
Temperature : 24-28°C
pH: 6.5-7.5
Color Form: Platinum, White, Yellow

Related on Fishs

Leave your comments

Latest on Fishs

Julidochromis transcriptus: Black-and-White Slender Cichlid

Moderate

Lake Tanganyika rock-dwelling cichlid

Julidochromis transcriptus is a small rock-dwelling cichlid from Lake Tanganyika, recognized by its compact, elongated body and irregular black-and-white pattern. It is a territorial cave dweller that is best kept as an established pair in a carefully structured aquarium. The supplied fish are identified as a DNZ pair, although sex, collection locality, and precise geographic form cannot be verified from the supplied material alone.
Azur Cichlid (Sciaenochromis fryeri) Care Guide

Moderate

Lake Malawi haplochromine cichlid

The Azur cichlid is commonly sold as Sciaenochromis fryeri, a predatory haplochromine cichlid from Lake Malawi. Mature males develop vivid electric-blue coloration, while females and juveniles are generally less intensely colored. This fish is moderately aggressive and needs a spacious aquarium with rocky structure, alkaline, mineral-rich water, and carefully selected tank mates. The supplied source describes a DNZ pair, but sex and exact locality cannot be confirmed from the images alone. Identification confidence is therefore good but not absolute.
Marble Angelfish (Pterophyllum scalare)

Moderate

South American freshwater cichlid

The marble angelfish is a captive-bred color form of Pterophyllum scalare, a tall-bodied South American cichlid valued for its elegant fins and distinctive irregular black patterning. It needs a mature, spacious aquarium with excellent water quality, warm water and suitable tank mates. Although generally manageable, adults establish territories and may become assertive when pairing or spawning. The supplied source identifies two marble angelfish; exact lineage and strain details cannot be confirmed from the available information.
Gold Angelfish, Pterophyllum scalare

Moderate

Freshwater South American cichlid

The Gold Angelfish is an ornamental colour form of Pterophyllum scalare, a tall-bodied South American cichlid valued for its graceful movement and parental care. It needs a mature, spacious aquarium with substantial vertical clearance, stable warm water and carefully chosen tank mates. The supplied source identifies two fish as Gold Angelfish, although the accompanying images show several angelfish colour and fin forms, so the exact appearance of the supplied specimens cannot be confirmed from the images alone.
Zebra Angelfish (Pterophyllum scalare)

Moderate

South American freshwater cichlid

The Zebra Angelfish is a selectively bred form of Pterophyllum scalare, recognised by a silvery body with several dark vertical bars and the tall, laterally compressed shape typical of freshwater angelfish. The supplied images also show other angelfish colour forms, so the exact appearance of the listed pair cannot be confirmed from the image set alone. This South American cichlid is generally manageable for experienced community keepers, but its size, territorial breeding behaviour and need for a tall aquarium should be planned for carefully.
Black Angelfish (Pterophyllum scalare)

Moderate

South American freshwater cichlid

The supplied record identifies two black angelfish, most likely a domestic color form of Pterophyllum scalare. The photographs show several angelfish color patterns, so they should not be treated as proof that every pictured fish is black or that all belong to the same strain. Black angelfish retain the tall, laterally compressed body and extended fins typical of freshwater angelfish. They need a tall, mature aquarium, stable warm water, a varied diet, and carefully selected tank mates.
White Marble Angelfish (Pterophyllum scalare)

Moderate

Freshwater cichlid

The white marble angelfish is a selectively bred aquarium color form of Pterophyllum scalare, a tall-bodied South American cichlid valued for its elegant fins and distinctive irregular dark marbling. It is generally peaceful when young but can become territorial, especially when paired for spawning. Successful care depends on a tall aquarium, excellent water quality, suitable tank mates, and a varied carnivorous-omnivorous diet. The exact genetic strain shown cannot be confirmed from photographs alone.
Freshwater Angelfish Mix (Pterophyllum scalare)

Moderate

Freshwater cichlid

Freshwater angelfish are tall-bodied South American cichlids valued for their graceful movement and wide range of captive color forms. The supplied source identifies a mixed group as Pterophyllum scalare; the photographs show several forms, including striped, black, orange, white, silver and blue-toned fish. They are manageable for experienced beginners, but their adult height, territorial breeding behavior and tendency to eat small tank mates require thoughtful aquarium planning.
Leopard Angelfish (Pterophyllum scalare)

Moderate

South American freshwater cichlid

The leopard angelfish is a domestic color form of Pterophyllum scalare, a tall-bodied freshwater cichlid from tropical South America. Its silver to yellowish body is marked with irregular dark spots or broken vertical bars, although pattern intensity varies with age, mood and breeding line. It is generally peaceful in a suitably spacious community aquarium, but pairs become territorial when spawning. This fish needs warm, clean water, generous vertical swimming space and tank mates too large to swallow.
Yellow Labidochromis (Labidochromis caeruleus)

Easy - Moderate

Lake Malawi mbuna cichlid

The Yellow Labidochromis is a bright yellow mbuna cichlid from Lake Malawi. Labidochromis caeruleus is generally manageable for an African cichlid, but it remains territorial and needs hard, alkaline water, rockwork, and carefully chosen companions. The supplied source identifies two fish as a pair; sex and pair bonding cannot be confirmed from the available images. This species is an adaptable algae grazer, a maternal mouthbrooder, and a rewarding choice for an appropriately planned Malawi cichlid aquarium.
Blue Pearl Angelfish (Pterophyllum scalare)

Moderate

Freshwater cichlid

The Blue Pearl Angelfish is a selectively bred colour form of Pterophyllum scalare, the freshwater angelfish. Its laterally compressed body, extended fins and tall profile make it a striking inhabitant of a planted community aquarium. The supplied trade label supports identification as this species and colour form, although individual colour intensity can vary. It requires warm, stable, clean water, generous vertical swimming space and thoughtful tank-mate selection, especially as adults become territorial when pairing or spawning.
Villavicencio Dwarf Cichlid Apistogramma macmasteri

Moderate

South American dwarf cichlid

Apistogramma macmasteri, commonly called the Villavicencio dwarf cichlid, is a small South American cichlid associated with the Río Orinoco drainage of Colombia. It is valued for its compact size, elaborate finnage and interesting courtship behavior. A bonded pair can be kept in a carefully structured aquarium with soft, clean water, sand, cover and several potential spawning sites. Although manageable for an experienced community aquarist, territorial behavior increases during breeding, so tank layout and tankmate selection are important.
Neolamprologus leleupi (Tanganyika Golden Cichlid)

Moderate

Lake Tanganyika rock-dwelling cichlid

Neolamprologus leleupi is a small, brightly coloured cichlid endemic to Lake Tanganyika in East Africa. It inhabits rocky coastal areas and uses crevices for shelter, feeding and spawning. Despite its modest size, it can be strongly territorial, particularly when paired or breeding. The supplied source identifies these fish as a golden colour form and a pair, although sex cannot be confirmed reliably from the image alone. Successful care depends on alkaline, mineral-rich water, abundant rockwork and carefully chosen tank mates.
Maingano Cichlid (Melanochromis cyaneorhabdos)

Moderate - Difficult

Lake Malawi mbuna cichlid

The Maingano, or Johanni Maingano, is a Lake Malawi mbuna recognized for its intense steel-blue body and dark horizontal markings. The supplied label combines “Johanni” with the scientific name Melanochromis cyaneorhabdos; these are distinct species, so identification should be confirmed from the seller or locality. This territorial mouthbrooding cichlid needs hard, alkaline water, abundant rockwork, a predominantly algae-based diet, and careful stocking to limit aggression.
Red Chocolate Gourami (Sphaerichthys vaillanti)

Difficult

Blackwater labyrinth fish

The red chocolate gourami, Sphaerichthys vaillanti, is a specialized Southeast Asian labyrinth fish suited to mature, soft, acidic blackwater aquariums. It is peaceful but easily stressed by bright lighting, strong currents and boisterous tank mates. The supplied source identifies these fish as a pair; sex and exact identity cannot be confirmed from the image alone, so identification should be checked against a reliable specimen reference. Stable water quality, cover and a varied small-food diet are central to long-term success.
Pelvicachromis pulcher Purple Tilapia Pair Care Guide

Easy - Moderate

Small West African freshwater cichlid

Pelvicachromis pulcher, commonly called the kribensis or purple cichlid, is a small West African cave-spawning cichlid valued for its manageable size, attractive breeding colors and attentive parental behavior. A bonded pair can live in a community aquarium when provided with suitable cover and carefully chosen tank mates. The supplied listing identifies the fish as Pelvicachromis pulcher, although photographs alone cannot confirm the exact locality or color form.