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Betta splendens

Betta spl. male halfmoon black orchid - Betta Fish for Sale UK

Beginner Friendly
Aggressive
£30.99Sold 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 black orchid halfmoon betta with flowing fins and bold personality, ideal for a warm, planted species tank. Easy care, aggressive. 24-30C, pH 6-7.5.

Care at a Glance

Scientific Name
Betta splendens
Max Adult Size
up to 7 cm
Lifespan
3 years
Care Level
Easy
Temperament
Aggressive
Temperature
24–30°C
pH Range
6–7.5
Hardness
1–15 dGH
Minimum Tank
38L
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.

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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
24–30°C
24°CIdeal30°C
pH Level
6–7.5
6Ideal7.5
Water Hardness
1–15 dGH
1 dGHIdeal15 dGH

Black orchid is the betta world's gothic statement: a near-black base shot through with darker iridescence, spread across the full half-circle of a halfmoon tail. On this 7 cm male the effect is theatre — in dim light he is a silhouette, under directed light the orchid layering surfaces and shifts. Few strains change character with the lighting the way this one does.

For all the drama he is rated easy care, making the black orchid one of the most forgiving routes to a top-shelf show male. Temperament is another matter: aggressive, with housing advice to match. Snails join safely; some shrimp species can work though individual males may prey on them; and very peaceful, non-nippy tank mates are conceivable only in larger, heavily planted aquariums with each fish's temperament weighed. Other male bettas, fin-nippers, aggressive or highly territorial species, large predators, and bright or long-finned fish stay out. He needs a 38-litre minimum, water at 24–30 °C, pH 6–7.5, hardness 1–15 dGH, a carnivore's menu, and surface calm in the top region he occupies. Territoriality climbs around breeding condition.

Dark fish hide problems, which makes his keeping routine slightly different: check him in good light at feeding time, when he is at the surface and side-on, because fin damage or colour dulling that white strains broadcast can pass unnoticed on near-black finnage. The routine itself is gentle — easy rating, 38 litres, heater inside 24–30 °C, carnivore meals, weekly changes holding pH 6–7.5 and 1–15 dGH. Aquascape with contrast in mind: pale sand, light hardscape or backlit planting turn him from shadow to centrepiece. His aggression is conventional for a show male; the snail-only default keeps it theoretical. Around three years of theatre for the price of basic consistency is the bargain on offer.

Black orchid halfmoon profile

  • Adult size approximately 7 cm
  • Lifespan around 3 years
  • Easy to care for
  • Aggressive — house singly
  • 24–30 °C
  • pH 6–7.5
  • 1–15 dGH
  • 38 litres and up
  • Carnivore
  • Top-water territory

Display advice for buyers

Pair him with a pale substrate or backlight planting and the dark finnage gains an edge most keepers never see in shop tanks. UK delivery via licensed live-animal courier — live arrival guaranteed on every order.

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  • 5 out of 5Verified buyer

    Easy website plenty of info on fish your buying great to pick a time slot

    TRACEY DURRANT · 7 Oct 2026

  • 4 out of 5Verified buyer

    Got some lovely fish thank you

    Kevin Mackie · 7 Oct 2026

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