Betta spl. male halfmoon red - Betta Fish for Sale UK

A full half-circle of solid red — that is what the halfmoon red male puts on display every time he flares, the caudal opening to the 180-degree spread that gives the fin type its name. At around 7 cm he sits at the larger end of standard show bettas, and in this colourway the effect is maximum drama: one uninterrupted sweep of red from body through to the fin edges.

His keeping profile is classic fighter. Rated aggressive, he should be planned as the only fish in his aquarium, with the record allowing small peaceful snails and, in heavily planted tanks, peaceful shrimp that may nonetheless be eaten. Cross off other male bettas, fin-nipping species, large aggressive fish, fast boisterous tank mates and long-finned fish that trigger his rivalry response. He asks for more space than his size suggests — a 40-litre minimum is recorded — because heavy finnage and an active temperament both benefit from room and calm, baffled flow. Water at 24–30 °C, pH 6.0–7.5, hardness 1–15 dGH completes the setup. He owns the top of the tank, and a breeding-conditioned male will defend it with intent.

The 40-litre figure on his record is the detail that separates good halfmoon keeping from merely adequate: that tail needs water to open into, and cramped quarters show in a narrowing spread within months. Furnish the upper region — his region — with floating plants and a resting leaf, keep outflow to a ripple, and feed the carnivore diet his record specifies with enough variety to maintain fin volume. Reds hold their saturation well when temperature is stable, so pick a point inside 24–30 °C and defend it. Check the spread during weekly maintenance the way you would check a sail for wear: edges crisp, rays even, fish forward at the glass demanding food. That is a halfmoon thriving.

Halfmoon red reference sheet

• Roughly 7 cm at adulthood
• Expected lifespan ~3 years
• Moderate care commitment
• Aggressive — solo housing
• Temperature 24–30 °C
• pH 6.0–7.5
• dGH between 1 and 15
• 40 litres or more
• Carnivore feeding
• Upper-region territory

From listing to your tank

Red halfmoons are perennial favourites and stock turns over fast. Each male is despatched insulated via licensed live-animal courier with live arrival guaranteed — set the tank up before you click buy and he can go straight in after acclimatisation.