Pearl Gourami Care Guide

The pearl gourami is the elegant, larger gourami, a deep-bodied centrepiece fish that is genuinely peaceful but genuinely shy, and that needs space, cover and dim light to look its best rather than a bare bright tank.

Pearl Gourami at a glance

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

Where it comes from

Trichopodus leerii comes from the lowland swamps and streams of the Malay Peninsula, Thailand, Sumatra and Borneo, typically soft, acidic, slow-moving, tannin-stained peat-swamp water choked with vegetation. That blackwater origin drives the care sheet: still water means low flow and heavy planting, oxygen-poor swamp water means a labyrinth organ and a need to reach the surface for air, and a dim, shaded, tannin-stained home means a shy fish that wants dappled light and floating cover. Under bright open lighting it feels exposed and hides. Soft, slightly acidic water suits wild-type and breeding fish, though tank-bred stock is adaptable.

Did you know?

• It has 'taste-buds on a string': the long thread-like ventral fins are modified sensory feelers covered in touch receptors and taste buds, which the fish trails over plants, food and tankmates to feel and taste its surroundings.
• It breathes air through a labyrinth organ, an adaptation to oxygen-poor swamp water.
• The 'pearls' name the fish: its body is dusted with iridescent white pearl/mosaic spots, hence Pearl, Lace, Mosaic and Diamond Gourami.
• Males blush red to breed, flushing a vivid orange-red throat and breast and flaring elongated fins.
• A bubble-nest dad: the male builds a floating nest up to about 25 cm across and guards eggs and fry.
• Hobbyists use pearls as a 'secret weapon' against hydra infestations that resist other controls.
• FishBase lists the species as Near Threatened (IUCN, assessed 2019), worth knowing for a common aquarium fish.

Tank size — and why

This is the load-bearing point for the species: it is larger than the dwarf and honey gouramis, a deep-bodied fish of about 12 cm, so about 30 US gallons (roughly 114 L) is the practical floor for one or a pair, 40 gallons-plus is better, and a proper group wants a 4-foot tank. Footprint matters for surface area (it works the top of the tank and needs open surface to breathe), for diluting a medium bioload, and for horizontal territory and refuge so a shy species and squabbling males can break sightlines. It is tall-bodied, so reasonable height plus a long footprint suits it, but prioritise length and surface area over a narrow column.

As a guide, a 30-gallon tank comfortably suits about 1 Pearl Gourami as a single-species display, leaving room for tankmates.

Water parameters in practice

Aim for 25-28 °C; the tolerated band runs about 24-30 °C (FishBase caps its recommended band at 28 °C, Seriously Fish allows up to 30 °C). pH 6.0-7.5 is ideal, with tolerance from roughly 5.5 (the soft, acidic wild end) up to 8.0, and hardness is forgiving across soft to moderately hard water. Tank-bred pearls are broadly tolerant of pH and hardness, so a cycled, stable, warm tank matters most; soft, slightly acidic, tannin-stained water best mirrors the wild biotope and helps spawning.

Diet & feeding

Wild pearl gouramis are omnivores leaning insectivore, taking small invertebrates, insect larvae, zooplankton and some plant matter. In the tank they are unfussy and accept most foods: a quality flake or micro-pellet staple plus live or frozen bloodworm, brine shrimp and daphnia, with occasional vegetable matter such as blanched courgette. Feed small amounts one to three times a day, only what is cleared in a minute or two. They are also one of the better aquarium fish for clearing hydra, and hobbyists use them as a biological control, though this rests on hobby experience rather than a primary study.

Gear & setup

Provide a heater, a cycled tank and gentle filtration (sponge or baffled), keeping flow low to mirror the still swamp. Plant heavily and include floating plants to diffuse light, because pearls want dim, dappled light and cover; a bare, bright tank produces a withdrawn, washed-out, stressed fish. Keep the tank covered but leave a warm humid air gap and do not fill to the brim, since the labyrinth organ needs surface air and gouramis can jump.

Temperament & behaviour

Repeatedly called one of the most peaceful gouramis and an excellent community fish, but genuinely timid: it withdraws if housed with boisterous fish or kept in a bare, bright tank, and needs cover to feel secure. Males are territorial with one another and can be quite hard on females when they want to breed, so same-species friction is mild but real, not zero. Give it security and calm tankmates and it settles and colours up.

Group & social needs

Not an obligate shoaler, but it does better in a small, female-skewed group rather than alone. The recommended structure is 1 male to 2-3 females, which spreads the male's attention and reduces male-male squabbling. A lone fish is fine, but a sensible group of 4 or more with that ratio is the better setup, and it keeps breeding-season harassment off any single female.

Compatible tank mates (preview)

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

• Bamboo Shrimp (Wood/Fan Shrimp) — Peaceful temperament, similar adult size.
• Bleeding Heart Tetra — Uses the midwater zone, peaceful temperament, similar adult size.
• Boesemani Rainbowfish — Uses the midwater zone, peaceful temperament, similar adult size.

A note on the shrimp and snails here: Pearl Gourami is peaceful and generally invertebrate-safe — but almost any fish will take very small shrimplets given the chance, so give shrimp dense cover (moss, leaf litter) if you want a colony to grow, rather than expecting every baby to survive.

See the full Pearl Gourami tank mates guide →

Breeding & sexing

Sexing is clear in mature fish: males develop a red-orange throat, breast and belly (brightest at breeding) with a longer, pointed dorsal and elongated, filamentous anal fin, while females are plumper and rounder-bellied with shorter, rounder fins. The thread-like ventral feelers are present in both sexes and are not a sexing cue. Breeding is rated easy: it is a classic bubble-nester. Condition on live or frozen foods, then provide soft, slightly acidic, warm water (around 28 °C) with a lowered level and floating plants; the male builds a large surface nest (up to about 25 cm across), wraps around the female, collects the eggs and guards the nest. Use a 1 male to 2-3 female ratio and remove the female after spawning, as males get rough. Expect roughly 200-300 eggs; eggs hatch in about 20-30 hours and fry are free-swimming a further 4-5 days later. Fry rely on gills until the labyrinth organ develops, so keep them warm, humid and tightly covered.

Lifespan

About 4-5 years is the most-cited figure. Past 6 years is reported but quite uncommon, and the occasional claim of 5-8 years or beyond a decade is single-source and optimistic; FishBase publishes no maximum-age field for the species. What shortens it is poor or unstable water quality, chronic stress from a too-small, too-bright or bare tank, aggressive tankmates, and disease, with this species being notably velvet-prone.

Common mistakes

• Underestimating its size and space needs: it is bigger than dwarf and honey gouramis (about 12 cm) and needs roughly 30 gallons-plus and a long footprint, not a nano tank.
• Using a bright, bare tank, when floating plants, dim light and cover are husbandry, not optional decor.
• Overfilling the tank or skipping the surface air gap, when an air-breather must reach humid surface air.
• Housing it with fin-nippers or boisterous fish, which shred its long fins and feelers or bully it into hiding.
• Keeping multiple males in too small a tank instead of a 1 male to 2-3 female ratio with space.
• Letting water go cold or unstable, which drives velvet, ich and fin rot in this velvet-prone fish.
• Mixing it with sketchy dwarf gourami stock, which risks iridovirus exposure.

Signs of trouble

• Hiding and withdrawal, and faded colour.
• Clamped fins and lethargy.
• Appetite loss.
• Flashing or rubbing against surfaces.
• A fine gold or rust 'dusting' (velvet, to which pearls are especially prone), or white spots (ich).

Is this fish right for you?

Don't buy this fish if you can't provide a heated, cycled 30 gallon-plus planted tank with cover, dim light and a calm community; it is a centrepiece community fish, not a nano or bowl fish. Pearls are hardy for a gourami, but they are notably velvet-prone, so cold or unstable water is the main avoidable risk. On stock quality the fish itself is robust, but buy from healthy, well-coloured stock and don't mix it with suspect dwarf gourami stock: the pearl is not the inbred dwarf gourami and is not a primary iridovirus reservoir (a key reason it is marketed as the hardier, safer large-gourami alternative), but other gouramis can be infected if exposed to a virus-carrying dwarf gourami, where roughly 20-50% of pet-store dwarf gouramis are estimated carriers.

Common questions

How big a tank do pearl gouramis need?

About 30 gallons is the minimum for one or a pair, with 40 gallons-plus and a 4-foot footprint better for a group. They are larger, deep-bodied fish that need both swim length and open surface to breathe.

How many pearl gouramis should I keep, and what ratio?

They do best in a small, female-skewed group: 1 male to 2-3 females spreads the male's breeding attention and reduces male-male squabbling. A single fish is fine but they prefer company.

Are pearl gouramis peaceful?

Yes, among the most peaceful gouramis, but also shy. Males are territorial with each other and rough on females when breeding, and the fish withdraws if kept with boisterous tankmates or in a bare, bright tank.

Can pearl gouramis live with tiger barbs or other nippers?

No. Fin-nippers like tiger barbs and serpae tetras shred the pearl's long filamentous fins and ventral feelers, causing stress and infection. Choose calm, non-nippy tankmates.

Do pearl gouramis eat hydra?

They are widely used to clear hydra, and many hobbyists treat them as a biological control. This is hobby consensus rather than a proven primary finding, so it is not guaranteed.

Are pearl gouramis affected by dwarf gourami iridovirus?

The pearl is not the inbred dwarf gourami and is not a primary DGIV reservoir, which is why it is recommended as the hardier large-gourami alternative. Even so, other gouramis can be infected if exposed, so avoid housing pearls with suspect dwarf gourami stock.

Sources & confidence

Sources & confidence (9 species)

These back the Pearl 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.

• Pearl Gourami Trichopodus leerii — Seriously Fish (seriouslyfish.com/species/trichopodus-leerii) high confidence
• Bamboo Shrimp (Wood/Fan Shrimp) Atyopsis moluccensis — Aquariadise (aquariadise.com/caresheet-bamboo-shrimp-atyopsis-moluccensis) high confidence
• Bleeding Heart Tetra Hyphessobrycon erythrostigma — Seriously Fish (Hyphessobrycon erythrostigma) 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
• Celebes Rainbowfish Marosatherina ladigesi — Seriously Fish (seriouslyfish.com/species/marosatherina-ladigesi) high confidence

Care-guide sources (8)

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.

• Seriously Fish — Trichopodus leerii
• FishBase — Trichopodus leerii
• Aquarium Co-Op — Top 5 peaceful gouramis
• Fishkeeping World — Pearl Gourami
• Tankarium — Pearl Gourami
• AquariumSource — Pearl Gourami care
• FishTankSetups — Pearl Gourami care (vs dwarf gourami)
• Aquatic Community — Breeding the Pearl Gourami

More on Pearl 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 →