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Betta splendens

Black Star Plakat Male Betta (Betta splendens) - Betta Fish for Sale UK

Moderate Care
Aggressive
£82.99Sold Out

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A bold XL male Black Star Plakat Betta with striking dark metallic patterning and a confident personality.

Care at a Glance

Scientific Name
Betta splendens
Max Adult Size
up to 6.5 cm
Lifespan
3 years
Care Level
Moderate
Temperament
Aggressive
Temperature
24–28°C
pH Range
6.5–7.5
Minimum Tank
40L
Diet
Carnivorous-leaning omnivore; quality betta pellets, frozen/live foods such as daphnia, brine shrimp and bloodworm

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
24–28°C
24°CIdeal28°C
pH Level
6.5–7.5
6.5Ideal7.5

Overview

The Black Star Plakat Betta is a striking variety of Betta splendens, prized for its intense colour contrast, compact finnage and charismatic behaviour. This XL male is a real showpiece fish, combining the athletic shape of the plakat form with dramatic dark tones and shimmering highlights that can appear almost star-like under aquarium lighting. Compared with long-finned bettas, plakats are typically stronger swimmers and less prone to fin damage, making them a popular choice for aquarists who want a hardy, eye-catching centrepiece fish.

As with all male bettas, this fish should be kept singly unless you are an experienced keeper with a carefully planned setup. When provided with the right environment, a Black Star Plakat Betta can thrive, display vivid colour, and become highly interactive with its keeper. At Tropical Fish Co, we carefully pack our livestock for fast UK delivery and back every order with our live arrival guarantee for peace of mind.

This is an intelligent, surface-oriented fish that prefers calm water, plenty of cover and a warm, stable aquarium. It is best suited to aquarists who can provide a mature tank and consistent maintenance. In return, you get a stunning fish with personality, movement and real presence.

Care at a Glance

Attribute Details
Scientific name Betta splendens
Common name Black Star Plakat Betta
Adult size Approx. 6–7 cm body length
Temperament Male: aggressive towards other males and similar fish
Care level Moderate
Minimum tank size 40 litres for one male
Temperature 24–28°C
pH 6.5–7.5
Diet Omnivore, protein-rich prepared foods with live/frozen supplements
Tank zone Top to middle

Origin & Natural Habitat

Betta splendens originates from Thailand and neighbouring parts of mainland South-East Asia, where wild ancestors inhabit shallow, slow-moving waters such as rice paddies, marshes, floodplains, ditches and still canals. These environments are typically warm, heavily planted and low in flow, with access to the water surface for breathing atmospheric air via the labyrinth organ. The species has been selectively bred for generations, producing the many colour forms and fin types seen in the aquarium trade today, including plakat varieties like this Black Star male.

Understanding the natural habitat helps with successful care. Bettas are adapted to warm, calm water with lots of visual barriers and resting places. They do not appreciate strong current or highly turbulent filtration, and they do best in aquariums that mimic the sheltered, plant-filled margins of their native waters.

Tank Setup & Water Parameters

A single male Black Star Plakat Betta should be housed in a well-covered aquarium of at least 40 litres, though larger is always better. A longer tank with gentle flow gives the fish more room to patrol and explore. Because bettas are surface breathers, a secure lid is essential to prevent jumping and to maintain warm, humid air above the waterline.

Use a soft substrate such as sand or smooth fine gravel, and add plenty of live or silk plants, driftwood and caves to create shelter and reduce stress. Floating plants are especially useful, as they help diffuse light and provide resting spots near the surface. Keep filtration gentle; a sponge filter or an adjustable internal filter with the outlet softened is ideal. Strong currents can exhaust plakat bettas and make them less active.

Stable water quality is crucial. Aim for a temperature of 24–28°C, pH 6.5–7.5 and zero ammonia and nitrite. Regular partial water changes, typically 20–30% weekly depending on stocking and filtration, will help maintain excellent conditions. As with all tropical fish, acclimate slowly and avoid sudden changes in temperature or chemistry. A mature aquarium is strongly recommended, as bettas can be sensitive to unstable new-tank conditions.

Decor should be smooth and free from sharp edges to protect the fins and body. Although plakats have shorter fins than long-finned bettas, they can still be damaged by rough ornaments or aggressive tank mates. Provide a few open swimming spaces as well as dense planting so the fish can choose between activity and cover.

Feeding Guide

Black Star Plakat Bettas are carnivorous-leaning omnivores and do best on a varied, protein-rich diet. A quality betta pellet or micro-pellet should form the staple, with frozen or live foods such as daphnia, brine shrimp, mosquito larvae and bloodworm offered several times per week. Variety supports colour, condition and natural feeding behaviour.

Feed small portions once or twice daily, only what the fish can consume in a minute or two. Bettas are prone to overeating, so it is better to underfeed slightly than to overfeed. Remove uneaten food promptly to protect water quality. Occasional fasting days can be beneficial, especially for adult fish kept in smaller aquaria. A well-fed betta will remain active, display strong colour and show good body condition without becoming bloated.

Tank Mates / Compatibility

Male bettas are best kept alone or with carefully chosen peaceful species in a suitably sized, well-structured aquarium. The Black Star Plakat Betta is generally more robust than long-finned forms, but temperament still varies between individuals. Avoid keeping him with other male bettas, fin-nippers, or brightly coloured fish with flowing fins that may trigger aggression.

Suitable companions in larger aquariums may include calm bottom dwellers and peaceful schooling fish that do not resemble another betta and do not compete at the surface. Good husbandry, plenty of cover and a spacious layout are essential if attempting a community setup. Always monitor interactions closely, especially after introduction.

Do not house with shrimp or very small invertebrates unless you are prepared for possible predation, as bettas may hunt them. Snails are usually a safer option, though individual behaviour can vary. If in doubt, a species-only setup is often the best way to enjoy the full colour and personality of this fish without stress.

Why Buy from Tropical Fish Co

When you order a Black Star Plakat Betta from Tropical Fish Co, you are choosing a carefully selected live fish from a specialist UK aquatic retailer. We prioritise healthy stock, careful packing and reliable service so your fish arrives in the best possible condition. Our fast UK delivery helps reduce transit stress, and our live arrival guarantee gives you added confidence when buying online.

We understand that live fish are a commitment, which is why we aim to provide accurate care information and quality livestock that is ready to settle into a well-prepared aquarium. Whether you are adding a standout centrepiece to a planted tank or looking for a hardy, engaging fish with real character, this XL Black Star Plakat Betta is an excellent choice for the right setup.

For best results, have your aquarium fully cycled, heated and covered before arrival. Float the bag to equalise temperature, then acclimate gradually. With stable water, a varied diet and a calm environment, this betta can reward you with vivid colour, confident behaviour and long-term enjoyment.

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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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