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Betta splendens

Betta spl. female SuperDelta red - Betta Fish for Sale UK

Moderate Care
Semi-Aggressive
£11.99Sold 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.
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A striking red Super Delta female betta with flowing fins and vibrant color, ideal for a warm, planted aquarium. Moderate care, semi-aggressive. 24-28C, pH 6.0-7.5.

Care at a Glance

Scientific Name
Betta splendens
Max Adult Size
up to 6 cm
Lifespan
3 years
Care Level
Moderate
Temperament
Semi-aggressive
Temperature
24–28°C
pH Range
6–7.5
Hardness
1–15 dGH
Minimum Tank
25L
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.

Similar choices available now

Blue and red male Betta splendens swimming side-on in an aquarium
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
1–15 dGH
1 dGHIdeal15 dGH

Red SuperDelta females bring show-bench finnage to the female side of the hobby: a broad tail approaching — though not quite reaching — the halfmoon's half-circle, carried in strong red on a 6 cm fish. Females of this grade flare and display just as readily as males in the right mood, and many keepers find them livelier day-to-day because the lighter finnage costs less effort to move.

Do not let the sex soften your planning, though. Her record reads semi-aggressive with a clear recommendation: best kept alone, or with very carefully chosen peaceful tank mates in a larger, heavily planted aquarium. Snails are dependable, and peaceful shrimp may settle in some setups while remaining at risk of being hunted. The avoid list covers other bettas — female groups included, on this record — plus fin-nipping fish, aggressive or highly territorial species, large predators and fast boisterous tank mates that outcompete her at feeding time. House her in at least 25 litres at 24–28 °C, pH 6.0–7.5, hardness 1–15 dGH. She works the upper water and can become territorial when breeding condition approaches; moderate care overall.

Females from show lines need their finnage maintained from the inside: protein-led carnivore feeding is what keeps a SuperDelta tail broad and carried well, and on a red fish the same diet feeds colour density directly. Her 24–28 °C band wants an accurate heater rather than a powerful one — 25 litres warms easily — and her water should sit inside pH 6.0–7.5 and 1–15 dGH, checked weekly rather than obsessively. Give her structure in the upper level where she lives. If she is destined for a breeding project, condition her gradually and expect the territorial behaviour her record flags; if she is purely display, simply enjoy a fish that flares like a male and recovers her composure faster.

SuperDelta red female: the numbers

  • Around 6 cm grown
  • Lifespan approximately 3 years
  • Moderate care needs
  • Semi-aggressive character
  • 24–28 °C temperature
  • pH 6.0–7.5
  • 1–15 dGH hardness
  • 25 litres and upward
  • Carnivorous diet
  • Upper-water swimmer

A buying pointer

Strong red females are useful both as standalone display fish and for keepers planning future breeding lines around the SuperDelta tail shape. UK despatch via licensed live-animal courier; live arrival guaranteed on every order.

Customer Reviews

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What customers say about ordering from us

  • 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

Reviews of our shop, collected by Judge.me, an independent third-party review collector. Newest first.