White Plakat Male Betta (Betta splendens)

Choose the White Plakat Male Betta for clean colour and an athletic build

The White Plakat Male Betta is a short-finned male Siamese fighting fish, Betta splendens, bred for a pure white body and white fins. Under good aquarium lighting the scales have a soft pearly sheen, the fins are fine and nearly translucent at the edges, and the dark eye stands out against all that white. In a planted tank he looks almost like porcelain against green leaves and dark wood.

Plakat is the name Seriously Fish gives for the short-finned strains of the species. They are closer in shape to the wild fish than the long-finned show forms such as the veiltail, halfmoon and crowntail. The tail on this fish is broad and rounded, opening out into an almost D-shaped fan when he flares, but every fin stays short. That build matters: a plakat carries less fin weight, swims faster and turns more sharply than a long-finned male, and his fins are less likely to tear on décor.

He is still a fighting fish. Seriously Fish states that ornamental strains are more aggressive than other Betta species, and OATA warns that two males kept together will fight until one is badly injured or killed. Plan on one male per aquarium and you have a bold, interactive fish that soon learns to greet you at the front glass.

Check the fit before you order

Browse every fighting fish we stock in our betta fish for sale range, open the wider labyrinth fish and betta category, or compare other males on the male Betta splendens page.

Know the species behind the white plakat

Seriously Fish gives the native range of Betta splendens as central Thailand, from Chiang Rai province south to Surat Thani and Phang Nga, and FishBase places it in the Mekong basin. Wild fish live in still or slow water: rice paddies, swamps, roadside ditches, ponds and the edges of streams, often shaded by plants and sometimes low in oxygen. FishBase lists the wild species as Vulnerable on the IUCN Red List. The ornamental bettas sold in shops are long-domesticated aquarium strains, and wild colour is a dull mix of browns and greens with a little iridescence.

The species belongs to the gourami family, Osphronemidae, within the labyrinth fishes. Seriously Fish explains that the labyrinth organ, a folded, blood-rich chamber above the gills formed from the first gill arch, lets the fish breathe air taken from the surface. FishBase calls the betta a facultative air-breather. That is why a betta needs access to the surface and humid air above it, and also why the organ is no excuse for a tiny, unfiltered tank.

Compare the white plakat with related males we sell

All of these are the same species with the same care. Our guide to betta types explains each fin form in more detail.

Know what one purchase supplies

One purchase quantity supplies one live male White Plakat Betta in our Large size grade. The photographs show the colour form and fin type, not the individual fish you will receive. Bettas change colour with mood, temperature and condition, and a fish fresh from transport often looks paler or shows faint stress lines; give him a week in a warm, clean tank before judging his colour.

Read our delivery days and Live Arrival Guarantee before ordering, and have the aquarium cycled, heated to 26°C and tested before he arrives.

Prepare these before delivery day

• Tank: at least 20 litres, ideally around 40, with a lid or cover glass.
• Heater: a thermostatic heater set to 26–28°C and checked with a separate thermometer.
• Filter: a sponge filter or a small internal filter with the flow turned down.
• Cover: plants, a cave or wood, and a resting leaf near the surface.
• Food: a betta pellet and one frozen food, so his first meals are ready.

Plan the aquarium around one male

OATA sets at least 20 litres for a single male and asks keepers to buy the largest tank they reasonably can, since bigger tanks hold temperature and water quality more steadily. Seriously Fish recommends a footprint of 45 × 30 cm, about 41 litres, for a single male or a pair, and explicitly argues against the tiny tanks and jars bettas are sometimes sold with. FishBase gives a maximum of 6.5 cm total length, Seriously Fish 70 mm standard length and OATA about 7 cm. The sources differ in how they measure, but all describe a fish of around 7 cm that needs room to patrol.

A plakat uses that room. Short-finned males swim hard along the glass and investigate every corner, so floor space matters more than height. A long, shallow tank also keeps the surface within easy reach, which helps a fish that breathes air.

Use a three-step space check

1. Measure the footprint: 45 × 30 cm or larger is ideal; 20 litres of real water is the minimum.
2. Check the real volume: gravel, rock and wood take up space, so confirm the litres with our tank volume calculator.
3. Plan any companions: if you want small tank mates, add them to our stocking calculator and allow a larger tank.

Furnish with plants, shade and a covered surface

Seriously Fish suggests tall stem plants, floating plants such as Salvinia and Riccia, water lilies and Cryptocoryne, with driftwood, clay pots or tubes as shelters and dried leaf litter on the bottom. The same source says to keep the tank well covered and not filled to the top: adults need humid air above the surface and are good jumpers. OATA adds that if you use cover glasses you must leave at least a small gap between the water and the glass so the fish can reach air.

A white fish shows best against dark wood, deep green plants and a darker substrate. Floating plants soften the light, which helps him relax, and broad leaves near the surface give him somewhere to rest. Our aquarium plants range has easy floating plants, Cryptocoryne and Java fern that suit a betta tank.

Divide the tank by function

Set warm, stable water where the sources overlap

Bettas are tropical fish and need a heater all year in the UK. The three sources agree on pH and broadly agree on temperature, but give different hardness ranges, so we work to the overlap and recommend keeping conditions steady rather than chasing a figure.

Seriously Fish notes that wild fish probably prefer slightly acidic water of pH 5.0–7.0, but domestic strains like this one are bred in a wide range of water and do well across the shared 6.0–8.0. Most UK tap water falls inside that once it has been treated with a conditioner. Check your readings against the species with our water matcher, and read more about heating in our betta temperature guide.

Separate habitat values from waste readings

Temperature, pH and hardness describe the water a betta prefers. Ammonia, nitrite and nitrate tell you whether the tank is clean. OATA’s targets are zero ammonia, zero nitrite and nitrate no more than 20 mg/l above your tap water. In a small tank these numbers rise quickly, so test weekly and after any change.

Filter gently and change water weekly

OATA says a filter is always essential, whatever the tank size, and that bettas need a gentle current so they can swim freely. Seriously Fish advises avoiding strong water movement and recommends a gentle air-powered sponge filter. If you use a small internal filter, turn the flow down or point the outlet at the glass. Our guide to aquarium filtration compares the options.

Follow a weekly maintenance sequence

1. Check the thermometer and test ammonia, nitrite, nitrate and pH.
2. Siphon about 25% of the water, as OATA recommends, removing waste from the substrate.
3. Treat the new water with tap water conditioner and match its temperature closely.
4. Rinse the sponge only in the water you removed, never under the tap, since chlorine kills the filter bacteria.
5. Trim floating plants so part of the surface stays open for him to breathe.

Feed small, measured meals

Wild bettas eat small invertebrates; FishBase lists zooplankton and mosquito and other insect larvae. Seriously Fish says captive fish accept dried foods but need regular small live or frozen foods such as daphnia, brine shrimp or bloodworm for colour and condition, and it warns that Betta species are particularly prone to obesity. OATA recommends feeding once a day, only what the fish eats within a few minutes, with a betta-specific pellet as the staple.

Build one measured meal

Introduce him to a mature aquarium

Add him only once the tank has finished its nitrogen cycle; our guide to the aquarium nitrogen cycle explains how to check. OATA’s floating bag method works well for bettas: switch off the lights, float the sealed bag for 10 minutes, add small amounts of tank water to the bag over up to 20 minutes, then release him without the bag water. Our guide to acclimatising new fish walks through each step.

Use a first-week checkpoint plan

• Day 1: lights off for the rest of the day and no food; let him explore.
• Day 2: two or three granules; test ammonia and nitrite.
• Days 3–5: watch that he eats, flares at his reflection now and then and holds his fins open.
• Day 7: full water test and the first routine water change. A bubble nest at the surface is a good sign he has settled.

Keep him alone or with very calm companions

Never keep two male bettas together. Seriously Fish does not recommend bettas for the standard community aquarium and advises avoiding tank mates with trailing fins or similar body shapes, which males may see as rivals. OATA adds that males do best alone or with very placid tank mates, since they are often victims of fin-nipping. Seriously Fish says some small cyprinids and loaches from similar habitats can work, but only after research. Our betta tank mates guide and tank mates checker help you test a plan before you buy.

Screen companions with suits and avoid

Watch for health problems early

A healthy male swims actively, eats eagerly, holds his fins open and flares now and then. OATA’s warning signs include hanging at the surface or sitting on the bottom, colour darker or paler than normal, more hiding than usual, fast or slow gill movement, white spots or fluffy growths, lost fins or scales, weight change and loss of appetite. Test the water first whenever something looks wrong.

Pair each observation with an action

Understand the bubble nest and breeding

A male in good condition often builds a bubble nest, a raft of bubbles at the surface, sometimes among floating plants, even with no female present. FishBase notes that males build and guard nests; it is normal behaviour, not a sign of a problem. Breeding is a project for a separate tank: OATA describes females showing vertical bars when ready, a courtship dance, eggs placed in the nest, and the female removed afterwards because the male guards the nest fiercely. OATA gives about one day for the eggs to hatch, and Seriously Fish 24–48 hours, with fry leaving the nest after three to four days. Seriously Fish adds that fry need humid air above the water for the labyrinth organ to develop properly.

Decide before you try

• Space: a separate breeding tank, plus growing-on tanks for dozens of young.
• Food: infusoria first, then microworm and brine shrimp nauplii, as Seriously Fish describes.
• Housing: young males must be separated as they mature, which needs many containers.
• Read first: our betta care guide covers the basics.

Never release fish, plants or tank water

OATA reminds keepers that releasing aquarium animals or plants into the wild is illegal and usually fatal to the fish, and that the Animal Welfare Act 2006 gives every pet owner a duty of care. Dispose of old water and substrate down the drain or in household waste.

Answer White Plakat Betta buying questions

What is a white plakat betta?

A male Siamese fighting fish, Betta splendens, from a short-finned line with pure white body and fins. Seriously Fish notes that plakat is the vernacular name for short-finned strains, which are closer in shape to the wild fish than the long-finned show forms.

How big does a white plakat betta grow?

Seriously Fish gives 70 mm standard length, FishBase 6.5 cm total length and OATA about 7 cm. A plakat’s short fins add less to that than the trailing fins of a veiltail, so he looks compact and muscular.

What size tank does he need?

OATA asks for at least 20 litres for one male. Seriously Fish recommends a base of 45 × 30 cm, about 41 litres, and argues against jars and tiny tanks. We suggest 40 litres or more, heated, filtered and covered.

What temperature should the water be?

Keep him at a steady 26–28°C. That sits inside OATA’s 20–28°C, Seriously Fish’s 22–30°C and FishBase’s 24–30°C. Use a thermostatic heater, because UK room temperatures are far too cool for a betta.

Can he live with other fish?

Never with another male betta. OATA says males do best alone or with very placid tank mates, and Seriously Fish does not recommend bettas for the standard community tank. A few small, calm, short-finned fish can work in a larger planted tank.

Is a plakat more active than a long-finned betta?

Short fins weigh less and drag less, so plakat males usually swim faster and more freely than veiltails or halfmoons and are less prone to torn fins. Seriously Fish notes that ornamental strains in general can be aggressive, so his temper is no milder.

Will he stay pure white?

The photographs show the colour form, not the individual fish. Betta colour shifts with mood, temperature and condition, and OATA lists a darker or paler colour than normal as a warning sign, so a steady white is a good sign of a settled, healthy fish.

What should I feed him?

A betta pellet or granule once a day, only what he finishes in a few minutes, plus small frozen or live foods such as daphnia or brine shrimp two or three times a week. Seriously Fish warns that bettas are particularly prone to obesity.

Consult the care references

• OATA: How to look after Siamese fighting fish (bettas) — UK trade body care sheet: adult size, minimum tank, water values, filtration, feeding, compatibility, acclimatisation, warning signs, breeding and the air gap under the lid.
• Seriously Fish: Betta splendens (Siamese Fighting Fish) — native range and habitat, adult size, tank footprint, water values, flow, cover, diet and obesity risk, behaviour, fin forms, labyrinth organ and bubble-nest breeding.
• FishBase: Betta splendens, Siamese fighting fish — family, recorded maximum length, water values, habitat, air breathing, natural diet and conservation status.
• Tropical Fish Co betta care guide, betta types guide and delivery terms — our own set-up, feeding and live arrival guidance.