Moderate
Betta spl. male crowntail white
24–30°C · pH 6–8 · 38L
£22.99
Halfmoon red male betta, ~7 cm with a 180° solid-red tail spread. Aggressive — house alone. 24–30°C, 40 litres minimum.
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 red
Halfmoon red male betta, ~7 cm with a 180° solid-red tail spread. Aggressive — house alone. 24–30°C, 40 litres minimum.
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
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.
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.
24–30°C · pH 6–8 · 38L
24–30°C · pH 6–7.5 · 20L
24–30°C · pH 6–7.5 · 20L
24–30°C · pH 6–7.5 · 38L
24–30°C · pH 6–8 · 20L
24–30°C · pH 6–7.5 · 38L
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
24–28°C · pH 5.5–7 · 60L
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