Known for their large, 180-degree spread tails that resemble a half moon when fully displayed. Come in a wide range of colors and patterns.
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Known for their large, 180-degree spread tails that resemble a half moon when fully displayed. Come in a wide range of colors and patterns.
Halfmoon Bettas are among the most striking Betta varieties due to their 180-degree tail spread that resembles a perfect half-moon when fully flared. Their tails and dorsal and anal fins are typically broad and symmetrical, giving them a flowing, elegant appearance. They come in a wide variety of colors and patterns including solids, marbles, and metallics. Males have dramatically larger fins than females, which are generally shorter and less vivid.
2-4 years
Carnivorous; prefers high-quality Betta pellets or flakes, supplemented with occasional live or frozen foods.
Halfmoon Bettas are often considered the pinnacle of Betta splendens breeding due to their dramatic tail spread and vibrant coloration. Their aesthetic appeal is matched by their expressive nature and interactive behavior. However, their elaborate fins require more care and make them more susceptible to fin damage and rot, so tank cleanliness and decor choices are critical. They are best kept alone or with peaceful, non-nipping species in a low-current environment. Halfmoon Bettas are ideal for aquarists looking for a visually captivating, intelligent fish with personality.
Intermediate
2.5 to 5 gallons
6.5 to 7.5
5–20 dGH
76–82°F (24–28°C)
2.5 to 3 inches
Harlequin Rasboras, Ember Tetras, Corydoras, Nerite Snails, Amano Shrimp (with care)
Other male Bettas, Tiger Barbs, Fancy Guppies, Angelfish, Gouramis
Betta splendens
Belontiidae
Thailand, Cambodia, Laos, Vietnam
Aggressive (males); females are semi-aggressive and may live in sororities with proper setup
Feed 2–3 times daily using high-protein Betta pellets as the staple. Supplement with live or frozen food such as daphnia, mosquito larvae, and bloodworms 2–3 times a week. Avoid overfeeding and provide occasional fasting days.
Bubble nest builder; male builds and guards nest
To breed Halfmoon Bettas, set up a breeding tank (5–10 gallons) with heater, sponge filter, and floating cover like Indian almond leaves or bubble wrap. Condition male and female with high-protein foods. Introduce the female in a clear container to stimulate bubble nest building. When ready, release her. The pair will engage in courtship, and the male will embrace the female during spawning, collecting eggs into the bubble nest. Remove the female after spawning to prevent aggression. The male tends the eggs and fry until they are free-swimming (~3–5 days). Feed the fry with infusoria or baby brine shrimp.
pH: 6.5–7.5, Temperature: 76–82°F, Hardness: 5–20 dGH, Ammonia/Nitrite: 0 ppm, Nitrate: <20 ppm
Halfmoon Bettas are more prone to fin rot due to their large fins, as well as swim bladder issues, ich, and velvet. Maintain clean water, avoid sharp tank décor, and ensure stable temperature to prevent illness.
Can be aggressive, especially towards other male Betta fish. Best kept alone or in a species-specific setup.
Halfmoon Bettas are highly expressive and territorial fish. Males flare their fins and gill covers to assert dominance or react to perceived threats. They can recognize their owners and will often interact at the front of the tank. These Bettas enjoy enrichment activities and can be trained with food rewards to perform tricks or navigate mazes. While aggressive toward other males, they are generally peaceful with non-aggressive tank mates that do not resemble other Bettas or nip fins. Females can live in groups with adequate space, hiding spots, and close observation.
The Halfmoon Betta is a show-stopping variety of Betta splendens, named for its full 180-degree tail spread that forms a semicircle when flared. Originating from years of selective breeding, this type is popular in Betta shows and competitions. Their tails and fins create a fan-like appearance that is both graceful and dramatic. Though stunning, their long fins require gentle filtration and soft, smooth tank decor to avoid damage. Halfmoons are known for their bold presence and lively interaction with owners. Their breeding requires more experience due to the delicacy of their fins and the importance of water conditions during spawning. For hobbyists seeking a centerpiece fish with elegance, intelligence, and a regal demeanor, the Halfmoon Betta stands unmatched.