−15%
Easy
Male Blue Veiltail Betta (Betta sp.)
20–28°C · pH 6–8
£9.34£10.99
Wild-type emerald betta with green, jewel-like iridescence for a calm planted tank. Moderate care, semi-aggressive. 24–28°C, pH 6.0–7.5.
Care at a Glance
Scientific Name
Betta smaragdina
Max Adult Size
up to 4.5 cm
Lifespan
3 years
Care Level
Moderate
Temperament
Semi-aggressive
Temperature
24–28°C
pH Range
6–7.5
Hardness
1–12 dGH
Minimum Tank
40L
Diet
Carnivore
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.
Water Parameters
Temperature
24–28°C
24°CIdeal28°C
pH Level
6–7.5
6Ideal7.5
Water Hardness
1–12 dGH
1 dGHIdeal12 dGH
Betta smaragdina
Smaragd Fighter, Emerald Betta (Betta smaragdina) - Wild Betta Fish for Sale UK
Moderate Care
Semi-Aggressive
£12.99Sold Out
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Live arrival guaranteed. If they don’t arrive healthy, email us a short unboxing video the same day for a replacement or refund. Packed in oxygenated bags with insulation and heat packs when needed.
£19.95 tracked delivery — half price (£9.98) from £100.00, free from £200.00. One delivery charge however many fish you add — everything travels together with a licensed live-animal courier.
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Wild-type emerald betta with green, jewel-like iridescence for a calm planted tank. Moderate care, semi-aggressive. 24–28°C, pH 6.0–7.5.
Care at a Glance
Scientific Name
Betta smaragdina
Max Adult Size
up to 4.5 cm
Lifespan
3 years
Care Level
Moderate
Temperament
Semi-aggressive
Temperature
24–28°C
pH Range
6–7.5
Hardness
1–12 dGH
Minimum Tank
40L
Diet
Carnivore
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.
Full Care Guide
Betta Fish Care Guide: Siamese Fighting Fish
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.
13 min readRead guide
Water Parameters
Maintain these water conditions for optimal health and vibrant colors
Temperature
24–28°C
24°CIdeal28°C
pH Level
6–7.5
6Ideal7.5
Water Hardness
1–12 dGH
1 dGHIdeal12 dGH
Native to the still and slow-moving waters of Southeast Asia, the Smaragd Fighter — known to most UK keepers as the Emerald Betta (Betta smaragdina) — takes its name from the green, jewel-like iridescence that runs across its body and fins. This is a wild-type fighter rather than a fancy long-finned strain, so it carries a natural, understated look that suits aquascaped and biotope-style tanks.
As a labyrinth fish it can gulp atmospheric air at the surface, and it spends most of its time in the upper layers of the aquarium. It stays compact at roughly 4.5 cm, but its semi-aggressive streak means stocking needs thought rather than guesswork. A carnivore by nature, it does best on small meaty foods, and with steady care it lives in the region of three years.
A planted aquarium of at least 40 litres, with a calm surface, floating cover and gentle flow, lets this betta settle, hold a small territory and show its bubble-nesting behaviour. Soft to moderately hard water in the listed range keeps it comfortable, and it accepts a wide hardness window of 1 to 12 dGH, which makes it adaptable for many UK tap-water profiles.
Keepers often ask whether the Emerald Betta can join a community: it can, but only a peaceful one, and many people choose to keep it as a species feature instead. Patience pays off, since a settled fish in clean, stable water will reward you with its full colour and its trademark surface-bubbling behaviour over its three-year span.
Care at a glance
- Adult size around 4.5 cm; lifespan up to 3 years
- Temperature 24–28°C, pH 6.0–7.5, hardness 1–12 dGH
- Minimum 40 litres; a top-dwelling, moderate-care species
- Carnivore — offer a varied meaty diet
- Semi-aggressive and territorial when breeding
Stocking notes
Only ever keep one male per tank — two male Betta smaragdina will fight. It works best as a species-only fish or alongside carefully chosen, non-nippy companions such as snails, or shrimp where they won't be seen as prey. Steer clear of aggressive or fin-nipping fish, large predators, very boisterous tankmates and anything that needs hard, alkaline water. Each emerald betta travels with a licensed live-animal courier and is covered by our live arrival guarantee.
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What customers say about ordering from us
4.6 on Google Maps, rated 4.6 out of 5 (opens in a new tab)4.4 · 91 shop reviews read them, rated 4.4 out of 5
- 4 out of 5Verified buyer
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
- 5 out of 5Verified buyer
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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