
Halfmoon Mustard Male Betta (Betta splendens)
26–28°C · pH 6–8 · 41L
A striking wild-type male betta with vivid yellow coloration, prized for its beauty, personality, and compact size. Moderate care, 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. Product-photo provenance and any image-specific limitations are stated on the listing.
Betta splendens
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A striking wild-type male betta with vivid yellow coloration, prized for its beauty, personality, and compact size. Moderate care, 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. 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
Benjarong yellow males come from the wild-type side of the betta hobby: a line kept close to the species' natural form, finished in vivid yellow on a 6.5 cm fish with the trim fins and darting movement that ornamental strains traded away generations ago. The yellow is the draw — bright, clean and constant, without marbling or banding to dilute it.
His record allows a touch more flexibility than most wild types: peaceful small fish that neither nip fins nor resemble him in colour or shape are listed as possible, alongside snails and some peaceful bottom-dwelling shrimp — with individual males still liable to hunt them. Firm exclusions: other male bettas, fin-nippers, aggressive or highly territorial fish, large predators, long-finned or similar-bodied fish, and small shrimp or fry, which he will treat as food. He is aggressive in grading, moderate in care, and specific in water: 24–30 °C, pH 6.0–7.5, and a softer 1–12 dGH hardness ceiling shared with our other wild lines. A 20-litre tank is the recorded floor. He occupies the upper water, eats as a carnivore, and turns territorial in season.
His record's tank-mate logic deserves a careful read: possible companions must be peaceful, must not nip, and must not resemble him in colour or shape — which in yellow rules out more candidates than keepers expect. Small drab schooling fish pass the test; anything golden, flowing or betta-shaped fails it. The same record sets his water softer than ornamental lines at 1–12 dGH, so verify your supply first. After that he is a 20-litre-minimum fish with a heater pinned in 24–30 °C, carnivore meals — wild lines repay frozen and live variety with stronger colour — and pH held between 6.0 and 7.5. Plant generously: cover is how wild-form bettas regulate their own confidence, and a confident fish shows the deepest yellow.
Wild yellows are a seasonal import for us rather than a constant line — when this listing reads in stock, the fish is here and ready to despatch by licensed live-animal courier under our live arrival guarantee.
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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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