
Halfmoon Koi Female Betta (Betta splendens)
26–28°C · pH 6–8
A striking white female halfmoon betta with flowing fins and vivid personality, ideal for a warm, planted aquarium. Moderate care, semi-aggressive. 24-30C, pH 6.0-7.5.
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 above for the actual shipping size. Product-photo provenance and any image-specific limitations are stated on the listing.
Betta splendens
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A striking white female halfmoon betta with flowing fins and vivid personality, ideal for a warm, planted aquarium. Moderate care, semi-aggressive. 24-30C, pH 6.0-7.5.
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 above for the actual shipping size. Product-photo provenance and any image-specific limitations are stated on the listing.

For one typical domestic Betta splendens, start with at least 20 litres, a mature filter, thermostatic heater, separate thermometer, gentle flow, a secure lid with surface access, and plants or refuges. Keep one male per aquarium.
Maintain these water conditions for optimal health and vibrant colors
All-white bettas divide opinion until people see one in the flesh — then the argument usually ends. This Halfmoon White female carries the type's broad tail spread in clean, unmarked white across her 6 cm frame, a colourway that turns crisp and luminous over dark substrate and makes every movement easy to follow. For aquascapers working in greens and shadows, she is the obvious accent fish.
Moderate care and a semi-aggressive temperament define the keeping plan. Snails are her safest companions; peaceful shrimp may hold their own in larger, well-planted tanks though hunting happens; and carefully selected peaceful bottom-dwellers are possible in bigger aquariums, added with caution. Her avoid list mirrors the species standard — male bettas, fin-nippers such as tiger barbs, aggressive or highly territorial fish, large predators, and fast boisterous species that wear her down. She settles from 20 litres upward, with the full 24–30 °C band available, pH 6.0–7.5 and hardness 1–15 dGH. Expect her stationed in the top third of the tank, and expect occasional territorial flashes — they pass, but they are part of owning any Betta splendens.
Plan her tank like a photographer and keep her like a pragmatist. Dark substrate, green planting and side lighting make an all-white fish luminous; the husbandry behind the image is plain — 20 litres or more, heater anywhere in the wide 24–30 °C band, carnivore feeding, weekly changes inside pH 6.0–7.5 and 1–15 dGH. White finnage doubles as a condition report, showing stress or water decline before most keepers would otherwise notice, so glance at fin edges at every feed. If you attempt the cautious bottom-dweller company her record allows in larger tanks, watch the opening days closely and have a fallback plan. Most owners conclude she carries the aquarium better alone.
White shows every detail — including fin condition — so we only ship females from this line in full health, by licensed live-animal courier with our live arrival guarantee behind every UK order.
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What customers say about ordering from us
I have a small group of long finned mountain minnows. So was delighted to be able to order ten of this variety to increase the genetics in my tank . The ones I recieved are healthy but it’s to early to give a verdict on wether they are of a long finned type since they are small currently.
Gordon Walker · 23 Sept 2026
100% success travel and "installation". Pleased with quality of purchase. The Siamese fighter a bit "shy" so have not yet seen him at his best yet but looking good. Happy customer. GG
George E Garratt · 21 Sept 2026
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