Alien Betta Female Blue (Betta spl.)

Females from the Alien blue line carry the same hypnotic metallic-blue mesh as the males — the patterning runs across her whole 6.5 cm body — with a temperament dialled down a step to semi-aggressive. For keepers drawn to the alien look but wanting slightly easier housing decisions, the female is the smarter pick.

Choose tank mates carefully: snails are safe, peaceful shrimp may settle in heavily planted tanks though hunting is possible, and very small, peaceful tank mates can be considered — but only in a larger, well-planted tank under close monitoring. Closed to her: other bettas, fin-nipping fish, large or aggressive cichlids, fast boisterous schooling fish, and species needing very different water conditions. The minimum aquarium size is 40 litres — generous, and the reason her limited community option exists at all. Hold the water at 24–30 °C, pH 6.0–7.5, hardness 1–15 dGH, feed her as a carnivore, and expect her in the upper region. Moderate care overall, with territoriality around breeding condition to watch for.

The 40-litre minimum is what unlocks her difference from the male: in that volume, the limited option of very small, peaceful tank mates becomes a workable plan rather than a risk. Keep the aquarium well-planted and monitor it closely — and add her after the residents are established. Her alien patterning needs the same point-lighting treatment as the male's to show its mesh detail, and her carnivore feeding should be targeted at the surface where she holds position. Chemistry is unremarkable: 24–30 °C, pH 6.0–7.5, 1–15 dGH, weekly changes. Watch her most closely around breeding condition, when her territorial behaviour is likeliest to surface, and have a separation plan if a community is running.

Alien blue female: housing facts

• Adult size about 6.5 cm
• ~3-year lifespan
• Moderate care needs
• Semi-aggressive nature
• 24–30 °C water
• pH 6.0–7.5
• dGH 1–15
• 40-litre minimum
• Carnivore
• Upper-tank swimmer

Pairing with the males

Many buyers take a female alongside a male Alien for future projects — house them separately; avoid keeping her with other bettas. UK orders travel by licensed live-animal courier under our live arrival guarantee.