Betta spl. female Alien green - Betta Fish for Sale UK

Green alien females are the compact jewel of the alien line: at 5.5 cm she is the smallest of our alien-type bettas, wearing the strain's metallic mesh in green iridescence that flickers as she moves through planted shade. Small fish, outsized visual impact — particularly in nano-scale aquascapes where larger bettas overwhelm the layout.

Her keeping profile suits her size. The recorded minimum is 20 litres, with water at 24–30 °C, pH 6.0–7.5 and a slightly narrower hardness band than most of our bettas at 1–12 dGH — worth checking against your tap water before ordering. She is semi-aggressive and moderate care: snails make safe company, peaceful shrimp may coexist in some setups though they can be hunted, and the avoid list covers other bettas, fin-nipping fish, aggressive or highly territorial species, large predators, and fast boisterous tank mates that stress her. A carnivore by record, she stays high in the water column and shows the species' territorial streak mainly around breeding condition. Beyond that, stable warmth and clean water are the entire job description.

Check your hardness before you order — her 1–12 dGH ceiling sits below the 15 most of our bettas tolerate, and very hard water areas may need rainwater or RO blending to bring the number down. That is genuinely her only complication. In suitable water she is a modest, manageable fish: 20 litres, heater anywhere in 24–30 °C, carnivore feeding scaled to her small frame, weekly maintenance inside pH 6.0–7.5. Her size recommends fine-grade foods and makes her a natural fit for detailed nano aquascapes where every centimetre of fish is on show. The green mesh patterning rewards close viewing distances — this is a fish for a desk or shelf you actually sit beside.

Alien green female parameters

• Compact 5.5 cm adult size
• Lifespan around 3 years
• Moderate care level
• Semi-aggressive temperament
• 24–30 °C heat band
• pH 6.0–7.5
• Hardness 1–12 dGH — check your water
• From 20 litres
• Carnivorous
• Top-region dweller

A note on sourcing

Green aliens appear in smaller numbers than blues in every import we receive; listed stock is live stock. Delivered UK-wide by licensed live-animal courier with our live arrival guarantee.