Moderate
Betta spl. male Halfmoon Mustard
24–30°C · pH 6–7.5 · 38L
£37.99
Green Halfmoon male betta, ~6.5 cm in a scarce light-shifting colour. Aggressive — keep alone. 24–30°C, 38 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 green
Green Halfmoon male betta, ~6.5 cm in a scarce light-shifting colour. Aggressive — keep alone. 24–30°C, 38 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
Green halfmoons occupy a strange, lovely corner of the hobby: the colour shifts with every angle of light, sometimes emerald, sometimes nearly teal, always carried across the 180-degree sweep of the halfmoon tail. This male reaches around 6.5 cm, and because green is among the least common colours in commercial betta breeding, he tends to be the fish visitors ask about first.
His husbandry profile is standard for a show male: moderate care, aggressive temperament, solo housing as the default. The record permits small non-aggressive snails, peaceful shrimp in larger well-planted tanks with predation possible, and very peaceful bottom-dwellers only in bigger aquariums under careful monitoring. It excludes other male bettas, fin-nipping species such as tiger barbs, aggressive or highly territorial fish, large predators, and fast boisterous tank mates that stress or outcompete him. Give him 38 litres or more at 24–30 °C, pH 6.0–7.5 and hardness 1–15 dGH, feed carnivore fare, and keep the upper water — his territory — calm and obstacle-light. Breeding condition raises the temperature of his temper, so to speak; plan introductions around it.
Lighting decisions matter more for green bettas than for any other colour we stock. His iridescence runs emerald to teal depending on angle, so try the tank perpendicular to a window or fit a movable lamp before settling the aquascape — ten minutes of experimentation repays three years of viewing. Underneath the optics, his needs are standard show-male fare: 38 litres minimum, gentle flow for the halfmoon spread, carnivore feeding, heater fixed inside 24–30 °C, water inside pH 6.0–7.5 and 1–15 dGH. The cautious bottom-dweller company his record permits in larger tanks works best added before him, never after. Greens are bought rarely and kept long; set his tank up accordingly.
True greens sell on sight in shops, which is why buying online when one is listed in stock is the dependable route. Despatch UK-wide by licensed live-animal courier, with our live arrival guarantee included.
24–30°C · pH 6–7.5 · 38L
24–30°C · pH 6–8 · 20L
24–30°C · pH 6–7.5 · 20L
24–28°C · pH 6–7.8 · 19L
24–30°C · pH 6–7.5 · 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