Banded Gourami Care Guide

The banded gourami is the big, hardy, semi-aggressive member of the family - roughly 10 cm, with males reaching about 12 cm - not the gentle nano fish its relatives are. It needs real space, planted cover and a strict one-male policy, and it is unusually cool-tolerant for a gourami. The old trade name 'Giant Gourami' is a trap, and the welfare risk runs from this fish to small tankmates, the opposite of the honey or sparkling gourami.

Banded Gourami at a glance

The sourced figures the welfare engine uses to judge Banded Gourami — the parseable key facts.

Where it comes from

Trichogaster fasciata (long filed in the hobby as Colisa fasciata, and the subject of a live name dispute - see the standout facts) was described by Bloch & Schneider in 1801 from Tranquebar on the Indian coast. Its range is South Asian: Pakistan, northern and north-eastern India, Nepal, Bangladesh and upper Myanmar. That range matters, because it reaches well into northern India, Nepal and the Himalayan foothill drainages, which see real seasonal cooling - the biological basis for its subtropical tolerance. It lives in large rivers, estuaries, ditches, ponds and lakes, generally favouring weedy, surface-vegetated, sluggish water, and it has colonised rice paddies; it is hardy enough to survive and even breed in foul, low-oxygen water, helped by its air-breathing labyrinth organ. The care follows from that: sluggish weedy water means gentle flow plus dense planting and floating cover, low-oxygen water means surface air access under a covered tank, and the northern range means it tolerates cooler water than tropical gouramis.

Did you know?

• The 'Giant Gourami' that isn't: long sold under a name Seriously Fish calls 'not particularly apt', the 10-12 cm banded gourami shares the common name with Osphronemus goramy, a ~70 cm food fish - a classic aquarium naming mix-up.
• A fish in the middle of a name war: a 2022 Journal of Fish Biology revision argues the hobby's 'banded gourami' should be renamed Trichogaster bejeus, with the name fasciata moving to the dwarf-gourami lineage. Databases haven't all followed, so the same fish currently travels under Trichogaster fasciata, Colisa fasciata and Trichogaster bejeus.
• The cold-hardy gourami: thanks to a range reaching northern India, Nepal and the Himalayan foothills, it tolerates cooler water than almost any other gourami - comfortable from about 21 degC and a candidate for subtropical, barely-heated tanks.
• It survives where others can't - wild banded gouramis are reported to survive and even breed in foul, low-oxygen water, aided by the air-breathing labyrinth organ.
• A prolific dad: the male builds a floating bubble nest, fertilises roughly 500-1000 eggs, and guards the nest and fry single-handedly - a far bigger spawn than the honey or dwarf gourami.
• Pointed fins tell the tale: male banded gouramis carry pointed dorsal and anal fins (rounded in females and in the look-alike thick-lipped gourami) - a clean field ID.
• IUCN lists it as Least Concern (assessed 2010).

Tank size — and why

Twenty gallons (about 75 L) is the sensible floor, not the 10 gallons that suits a honey gourami. Seriously Fish gives a 75 x 30 x 30 cm / 71 L footprint for a pair, and other sources cite around 70 L. The reason is the fish itself: a 10-12 cm semi-aggressive, territorial gourami needs footprint and visual breaks so a dominant male cannot corner tankmates or a second male, room for a one-male and several-female group, and the water stability a larger volume gives. Do not treat it as a 10-gallon nano gourami. Prefer length over height - some sources note it does best in shallower tanks.

Keep a single Banded Gourami — its own kind fight, so the answer is one regardless of tank size, with non-rival tankmates added only in a larger, planted tank.

How big does it really get?

Full-grown Banded Gourami reach about 10 cm (3.9 in) long, but they are usually sold at only about 2.5 cm (1 in) — a typical shop size (estimate). At full size, Banded Gourami needs roughly a 20-gallon tank, about 76 cm long; a common 10-gallon starter kit is only about 51 cm.

Adult size is sourced; the shop size is a typical-juvenile estimate; tank length is approximate for a standard 20-gallon aquarium.

Water parameters in practice

Aim for 22-27 degC, with a tolerated band of about 21-28 degC. Its standout husbandry trait is cool tolerance: every primary source puts the low at 21-22 degC, already cooler than most tropical gouramis, so it suits a subtropical or barely-heated room. One widely-quoted hobby wiki claims it handles water as cold as 10 degC, but that figure is single-source and could not be corroborated, so treat ~21-27 degC as the sensible range and do not deliberately run it cold. pH 6.0-7.5 is well-agreed across sources, with no extension to 8.0, and hardness around 4-15 dGH. It is hardy and adaptable, so stability, gentle flow and zero ammonia matter more than chasing exact numbers - but it still needs a fully cycled tank; surviving foul water in the wild is not licence to skip cycling.

Diet & feeding

An omnivore leaning slightly carnivorous (FishBase trophic level 2.8) and famously unfussy - very easy to feed. Give a quality flake, granule or pellet staple including a green or spirulina component, plus regular live or frozen bloodworm, mosquito larvae, daphnia, brine shrimp (Artemia) and tubifex; it also takes chopped vegetables and algae wafers. Live and frozen foods noticeably deepen male coloration. Feed small amounts once or twice a day. As a larger, bolder feeder than the honey or dwarf gourami it is much less likely to be out-competed, though in a community you should still check that slower mid- and top-water fish get their share.

Gear & setup

A heater is optional rather than mandatory in a temperate room given the cool tolerance, but stable warmth is still the goal. Filtration should suit a 10-12 cm fish - a medium bioload, more than a 5 cm honey gourami - delivered gently rather than as strong current. Plant well with floating plants and hiding places: cover settles a timid newcomer on arrival and breaks a dominant male's line of sight once it is established. Keep the tank covered with a warm, humid air gap and do not fill to the brim, because the labyrinth organ needs surface air and gouramis jump.

Temperament & behaviour

The temperament is the headline, and the truth is in the qualifier. It is generally peaceful and community-suitable, but territorial males fight one another - especially in smaller tanks - and the fish turns outright aggressive when spawning and guarding a nest. Seriously Fish calls it suitable for most peaceful community tanks yet 'a bit aggressive when spawning', and notes males will fight amongst themselves in smaller tanks. It is also a study in contrasts: timid and easily startled on arrival, yet capable of territorial dominance once settled. The load-bearing rule is one male per tank - several males need a large, heavily-planted, broken-up footprint or they will fight. Because it is big and semi-aggressive, the danger is that it harasses small, timid, slow tankmates and rival males, not that it gets bullied. Pair it with robust, similarly-sized, non-fragile fish such as barbs, danios, larger rasboras, loaches, corydoras, rainbowfish, larger tetras and platies. Avoid a second adult male or similarly-shaped gouramis (rivalry), the thick-lipped gourami (they hybridise), and very small, shy, slow fish - which is why the small, slow gouramis like the honey, dwarf and sparkling are kept out of this fish's recommended tankmates even though a coarse welfare check clears them: a 10-12 cm semi-aggressive gourami will dominate, out-compete or harass them.

Group & social needs

Not a schooling fish. It can be kept singly, as a one-male and several-female group, or - per some sources - as a small group of five or six, always provided there is only one male unless the tank is large and heavily broken up. A single specimen is perfectly fine.

Compatible tank mates (preview)

A short, engine-cleared shortlist — the species TankStocking's welfare engine clears with Banded Gourami and that suit its size and temperament best. Tap any to load the pairing in the planner.

• Boesemani Rainbowfish — Peaceful temperament, similar adult size.
• Bolivian Ram — Uses the bottom zone, peaceful temperament, similar adult size.
• Brilliant Rasbora — Peaceful temperament, similar adult size.

This engine-cleared shortlist is Banded Gourami's tankmate surface for now — a dedicated tank-mates guide can follow for high-demand species.

Breeding & sexing

Sexual dimorphism is strong, which makes sexing easy: males are vividly coloured with an orange-to-coppery body crossed by oblique iridescent blue bars and carry pointed, extended dorsal and anal fins, while females are smaller, drabber silvery-grey to olive with rounded fins. That pointed-versus-rounded anal fin also separates a banded gourami male from the look-alike thick-lipped gourami, with which it hybridises. It is a bubble-nester (difficulty moderate, and it is readily bred, including in induced-spawning trials): the male builds a floating nest, spawns beneath it, then collects the eggs and guards the nest and fry alone - so remove the female after spawning, as the male becomes aggressive. It is prolific, far more so than the honey or dwarf gourami, with roughly 500-1000 eggs per spawn (one source gives a lower 300-800 across multiple spawns). Eggs hatch in about 24-36 hours and fry are free-swimming around three days later; start them on infusoria or rotifers, then baby brine shrimp, under a tight warm lid.

Lifespan

A realistically well-kept banded gourami lives about 4-6 years, with up to roughly 8 years as a documented best case and under 4 years common in cold, dirty or chronically stressful tanks; FishBase publishes no maximum-age field. What shortens it is poor water quality, sustained territorial stress in cramped tanks, and - less of a risk here than for tropical gouramis - chilling.

Common mistakes

• Confusing it with the true 'Giant Gourami' (Osphronemus goramy). The old trade name makes some buyers fear a 70 cm monster and others accidentally buy the actual O. goramy expecting a 10 cm community fish - verify the scientific name (Trichogaster/Colisa fasciata is ~10-12 cm; O. goramy reaches ~45-70 cm).
• Treating it as a tiny nano gourami and under-tanking it. At 10-12 cm and semi-aggressive it is not a 5-10 gallon honey-gourami substitute; give it 20 gallons or more with footprint and planting.
• Keeping more than one male in a normal community tank. Males fight each other and similarly-coloured fish and turn aggressive when spawning - keep one male unless the tank is large and heavily broken up.
• Pairing it with tiny, timid or slow tankmates. A semi-aggressive 10-12 cm fish will harass or eat very small or shy species and shrimp or fry, so the small gouramis (honey, dwarf, sparkling), chili rasbora, ember tetra and similar are poor matches despite looking compatible on paper.
• Mixing it with thick-lipped gouramis if you want pure stock - they hybridise.
• Assuming 'hardy and cool-tolerant' means it needs no care, or deliberately running it cold. It is forgiving but still needs a cycled, stable, planted, gently-filtered tank, and the 'down to 10 degC' claim is single-source.
• Filling the tank to the brim or leaving no lid gap, when it needs surface air access and a warm humid air layer.

Signs of trouble

• Clamped fins and faded colour.
• Hiding and refusing food.
• Lethargy and gasping at the surface beyond normal labyrinth breathing.
• White spots or film - usually triggered by poor water, chilling or stress.
• A harassed, hiding subordinate male, or a bullied tiny tankmate - the stress here can run both directions, so watch both the gourami and anything small kept with it.

Is this fish right for you?

Don't buy this fish if you can't give it around 20 gallons or more with cover, can't commit to a one-male policy, or want a peaceful nano centrepiece for a tank of tiny, timid fish - in that case choose a honey gourami instead. On health, there is no documented dwarf-gourami-iridovirus epidemic in this species, because it is not an inbred colour line - but treat that as 'no reported problem', not proven immunity, and still quarantine new stock.

Common questions

How big do banded gouramis get?

Typically about 10 cm, with males reaching roughly 12-12.5 cm and females smaller at about 6-9 cm. That is noticeably bigger than a dwarf (~8 cm) or honey gourami (~5 cm), which is why it needs more space and robust tankmates.

Is the banded gourami the same as the Giant Gourami?

No - that is a confusing old trade name. The banded gourami (Trichogaster/Colisa fasciata) reaches 10-12 cm, while the true giant gourami (Osphronemus goramy) grows to about 45-70 cm. Always check the scientific name.

Is the banded gourami aggressive?

It is best called semi-aggressive: generally peaceful in a robust community, but territorial males fight each other and it becomes aggressive when spawning and guarding a nest. Keep only one male, and avoid very small or timid tankmates it could harass.

Can I keep two banded gouramis together?

Keep only one male. A single male with one or several females is fine, but two males will fight unless the tank is large, heavily planted and broken up with hiding places and sight-line breaks.

What can live with a banded gourami?

Robust, similarly-sized, non-timid fish: barbs, danios, larger rasboras, most loaches, corydoras and small-to-medium catfish, peaceful rainbowfish, larger tetras and livebearers like platies. Avoid a second male or similar gouramis, tiny shy fish such as the honey, dwarf or sparkling gourami and small nano fish, thick-lipped gouramis (they hybridise), and aggressive cichlids or fin-nippers.

Does the banded gourami need a heater?

Often not in a temperate room - it is unusually cool-tolerant, comfortable from about 21 degC and suited to a subtropical or barely-heated tank. Stable warmth still matters, and the much-quoted 'down to 10 degC' claim is single-source, so don't deliberately keep it cold.

Is it called Trichogaster fasciata or Trichogaster bejeus?

Both are in use. Most databases, including FishBase, still list it as Trichogaster fasciata (synonym Colisa fasciata), but a 2022 study proposes Trichogaster bejeus for this fish and some retailers have adopted it. Adoption is not yet universal.

Sources & confidence

Sources & confidence (9 species)

These back the Banded Gourami figures and the previewed tank mates above. Each figure is read from the TankStocking species database (v2026.06); below is the care reference behind it and how confident we are in that data. Confidence reflects the source quality, not whether any pairing is safe. Full source list and the welfare model are on the methodology page.

• Banded Gourami Trichogaster fasciata — Seriously Fish (seriouslyfish.com/species/trichogaster-fasciata) high confidence
• Boesemani Rainbowfish Melanotaenia boesemani — Seriously Fish; Aquarium Co-Op Boesemani guide high confidence
• Bolivian Ram Mikrogeophagus altispinosus — Seriously Fish (seriouslyfish.com/species/mikrogeophagus-altispinosus) high confidence
• Brilliant Rasbora Rasbora einthovenii — Seriously Fish (seriouslyfish.com/species/rasbora-einthovenii) high confidence
• Bristlenose Pleco Ancistrus sp. — Aquarium Source / aqua-fish.net Ancistrus care guides high confidence
• Bronze Corydoras Corydoras aeneus — Seriously Fish (seriouslyfish.com/species/corydoras-aeneus) high confidence
• Checker Barb Oliotius oligolepis — Seriously Fish — Oliotius oligolepis (https://www.seriouslyfish.com/species/oliotius-oligolepis/) high confidence
• Cherry Barb Puntius titteya — Seriously Fish (Puntius titteya) seriouslyfish.com/species/puntius-titteya high confidence
• Clown Pleco Panaqolus maccus — Fish Laboratory (fishlaboratory.com/fish/clown-pleco); AquariumStoreDepot high confidence

Care-guide sources (11)

This guide synthesises the references below; where they disagree, the range and the disagreement are noted in the text above. The figures in the key-facts box are read from the TankStocking species database (v2026.06). Full welfare model on the methodology page.

• FishBase - Trichogaster fasciata (Banded gourami) — authority (Bloch & Schneider 1801), distribution, weedy river/pond/ditch habitat, temp 22-28 degC, pH 6.0-7.5, dH 4-15, max 12.5 cm TL, trophic level 2.8, IUCN Least Concern (2010), labyrinth organ
• Wikipedia - Trichogaster fasciata — type locality Tranquebar, synonyms, local names, 'Giant Gourami' confusion with O. goramy, easy to breed, Knight et al. 2022 synonymy note, IUCN LC
• Seriously Fish - Trichogaster fasciata (Banded Gourami) — habitat (sluggish, surface-vegetated, paddies), temp 21-28 degC, pH 6.0-7.5, hardness 5-15, males >10 cm, 'Giant Gourami' name not apt, peaceful but aggressive when spawning, males fight in smaller tanks, 75x30x30 cm/71 L for a pair, pointed male fins, bubble-nester 500-1000 eggs, hatch 24-36 h
• Knight, Rema Devi & Praveenraj (2022) - identity of the banded gourami (Journal of Fish Biology) — peer-reviewed revision proposing the hobby 'banded gourami' = Trichogaster bejeus, with T. lalius treated as a synonym of T. fasciata
• fishkeeper.co.uk (Maidenhead Aquatics) - Indian Banded / Striped Gourami — listed as Trichogaster bejeus (formerly fasciata), max 12 cm, temp 22-28 degC, pH 6.0-7.5, hardness up to 15, peaceful/community, male pointed anal fin vs rounded in thick-lipped gourami, 500-1000 eggs, hatch ~24 h
• Aquadiction - Banded Gourami — max ~10 cm, lifespan up to 5 yr (4-6 in FAQ), temp 23-28 degC, pH 6.0-7.5, GH 5-15, swim level 'Middle', peaceful but assertive when spawning, male conflicts limited to own kind / similar fish, pairs or group of 5-6, thick-lipped hybridisation, 300-800 eggs
• The Dynamic Nature - Banded gourami — male 10-12.5 cm, temp 72-82 degF, pH 6.0-7.5, ~70 L for a pair, peaceful/timid, survives and breeds in foul water, male guards nest aggressively, 500-1000 eggs, hatch ~24 h, fry on infusoria/rotifers
• aqua-fish.net - Banded Gourami (Colisa fasciata) — temp 22-28 degC, pH 6-7.5, hardness 4-15, size 10-12 cm, lifespan up to 4 yr, peaceful, tankmate list, avoid tiger barbs/aggressive cichlids, breeding water depth ~20 cm, hatch 24 h
• tropicalfreshwaterfish.com - Banded Gourami (Colisa fasciata) — minimum tank 20 gallons, temp 70-82 degF, pH 6.0-7.5, 4-15 dH, shy/timid yet aggressive when spawning, males squabble among themselves / similarly-coloured fish, 500-1000 eggs, breeding tank 79-84 degF, lifespan 5-8 yr
• Giant gourami (Osphronemus goramy) - Wikipedia — the TRUE giant gourami at ~45-70 cm SL - used only to contrast with the banded gourami and debunk the shared 'Giant Gourami' name
• USGS NAS - Banded gourami (Trichogaster fasciata) — native range, size ~12 cm, failed aquarium-release introductions in Florida and Pennsylvania

More on Banded Gourami

Related guides on TankStocking — each scored by the same welfare engine as the planner.

This care guide is a sourced planning reference, not veterinary advice — individual fish, filtration and maintenance all matter. Cycle the tank, test your water, and observe your fish. How TankStocking works →