Croaking Gourami Care Guide – Tank Setup, Feeding and Breeding

Quick summary

The Croaking Gourami is a hardy, easy-to-keep fish ideal for beginners with at least a 60 litre planted tank, best kept in groups of four to six, and notable for the audible croaking sounds it makes to communicate. It’s peaceful and beginner-friendly, though breeding requires more experience, and tank mates should be calm and non-aggressive to avoid stressing this somewhat shy species.

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In this guide:

Introduction
Quick Stats
Appearance
Natural Habitat
Tank Size and Setup
Water Parameters
Filtration and Equipment
Diet and Feeding
Behaviour and Temperament
Tank Mates
Breeding
Common Diseases
FAQs

Introduction

The Croaking Gourami (Trichopsis vittata) is a fascinating and underappreciated freshwater labyrinth fish from Southeast Asia. It is the largest member of the genus Trichopsis, which also includes the popular Sparkling Gourami (Trichopsis pumila) and the less commonly seen Threestripe Gourami (Trichopsis schalleri). While its relatives have gained a stronger following in the aquarium hobby, the Croaking Gourami offers an equally rewarding – and arguably more characterful – keeping experience. Its namesake ability to produce clearly audible croaking and clicking sounds sets it apart from the vast majority of aquarium fish. These vocalisations are produced by a specialised pectoral-fin mechanism and are used during courtship displays, territorial disputes, and general social interactions. In a quiet room, keepers can often hear their fish “talking” to one another, a genuinely unique experience in the freshwater hobby.

Trichopsis vittata is a hardy and adaptable species that thrives in modestly sized aquaria, making it well suited to both beginner and experienced fishkeepers. Its subtle beauty, interesting behaviour, and manageable care requirements make it a superb choice for planted community tanks, species-only setups, and biotope aquaria replicating the slow-moving waterways of mainland Southeast Asia. Despite being widely distributed in the wild, the Croaking Gourami remains somewhat overlooked in the trade, overshadowed by its smaller cousin the Sparkling Gourami and by flashier anabantoid species. This guide aims to give the species the attention it deserves, covering every aspect of its care, from tank setup and water chemistry to breeding and disease prevention.

Quick Stats

Scientific name	Trichopsis vittata
Common names	Croaking Gourami, Talking Gourami
Family	Osphronemidae
Origin	Southeast Asia (Thailand, Vietnam, Cambodia, Laos, Malaysia, Indonesia)
Adult size	6 – 7 cm
Lifespan	3 – 5 years
Difficulty	Easy
Breeding difficulty	Moderate
Temperature	22 – 28 °C
pH range	5.5 – 7.5
General hardness (GH)	2 – 15 dGH
Carbonate hardness (KH)	2 – 10 dKH
Minimum tank size	60 litres
Conservation status	Least Concern (IUCN)

Appearance

The Croaking Gourami is a slender, laterally compressed fish with a pointed snout and an elegant finnage profile. Adults typically reach 6 to 7 cm in total length, making Trichopsis vittata noticeably larger than the Sparkling Gourami (Trichopsis pumila), which rarely exceeds 3.5 cm. The body shape is elongated compared to many other gouramis, giving the fish a streamlined, almost torpedo-like silhouette when viewed from the side.

The base body colour is a warm brown to golden-beige, overlaid with two to four dark horizontal stripes that run from behind the eye to the caudal peduncle. These stripes vary in intensity depending on the fish’s mood, water conditions, and level of stress. When in good condition and displaying, the flanks shimmer with iridescent blue-green spangles, and the fins take on a striking appearance. The dorsal, anal, and caudal fins are edged with blue to turquoise highlights and often feature reddish-brown or rust-coloured rays, which become more vivid during courtship. The pectoral fins, responsible for the species’ signature croaking mechanism, are transparent and relatively large for the fish’s body size.

The eyes are relatively large and are set on a somewhat pointed head, giving the Croaking Gourami an alert, intelligent look. Males tend to be slightly more slender than females and typically display more intense fin coloration, particularly in the anal and caudal fins, which may appear longer and more pointed. Females are generally a touch rounder in the belly, especially when carrying eggs, though the differences can be subtle outside of breeding condition. Under ideal lighting, the iridescent scaling of the Croaking Gourami can rival any of the more popular small gourami species, and it is well worth positioning aquarium lights to bring out these reflective qualities.

Natural Habitat

Trichopsis vittata has one of the broadest natural distributions of any small anabantoid species. It is found across much of mainland Southeast Asia, including Thailand, Vietnam, Cambodia, Laos, peninsular Malaysia, and parts of the Indonesian archipelago, particularly Sumatra, Borneo, and Java. The species occupies an enormous variety of freshwater habitats, from rice paddies and irrigation ditches to slow-moving streams, swamps, peat forests, and the margins of larger rivers. This remarkable adaptability is a key reason for its hardiness in captivity.

In the wild, Croaking Gouramis are most commonly encountered in shallow, slow-moving or stagnant water with dense vegetation. These habitats are often heavily shaded by overhanging riparian growth and contain large amounts of submerged leaf litter, fallen branches, and aquatic plants such as Cryptocoryne species, Eleocharis, and floating plants like Salvinia and Pistia. The water in many of these habitats is soft and acidic, often tea-coloured from the tannins released by decomposing organic matter. However, the species has also been recorded in waters with a near-neutral pH and moderate hardness, reflecting its considerable tolerance range.

As a labyrinth fish, Trichopsis vittata possesses an accessory breathing organ that allows it to gulp atmospheric air at the water surface. This adaptation is crucial in its native habitats, which are frequently low in dissolved oxygen due to high temperatures, stagnant conditions, and dense organic loading. Understanding this natural environment is essential for replicating appropriate conditions in the aquarium.

Tank Size and Setup

A minimum tank size of 60 litres is recommended for a small group of Croaking Gouramis. While the species is not particularly active in terms of open-water swimming, it is social and benefits from being kept in groups of at least four to six individuals, which necessitates adequate space. For a larger group or a community tank incorporating other species, 80 to 120 litres or more is preferable.

The ideal aquascape for Trichopsis vittata draws inspiration from its natural habitat: a densely planted setup with plenty of cover, subdued lighting, and a dark substrate. Use a fine sand or fine gravel substrate in a dark colour to help the fish feel secure and to show off their iridescent scaling to best effect. Plant the tank generously with a mix of rooted plants such as Cryptocoryne wendtii, Cryptocoryne parva, Vallisneria nana, and Java Fern (Microsorum pteropus), along with floating plants such as Amazon Frogbit (Limnobium laevigatum) or Salvinia to diffuse overhead light. The floating plants serve a dual purpose: they reduce light intensity, which the fish appreciate, and they provide surface structure that is important if breeding is desired, as males build bubble nests beneath leaves and other floating matter.

Driftwood, particularly pieces that release tannins, is an excellent addition. Catappa (Indian Almond) leaves placed on the substrate will further tint the water and release beneficial tannins, creating blackwater conditions closer to the species’ natural environment. These leaves also provide additional surfaces for biofilm growth, which serves as a supplementary food source for fry and adult fish alike. Provide plenty of visual barriers using plants, wood, and even coconut shells or clay pots, as these help break up lines of sight and reduce aggression between males.

A tightly fitting lid is essential. Like all labyrinth fish, Croaking Gouramis regularly visit the water surface to breathe atmospheric air. A lid maintains a humid, warm air layer above the water, which protects the labyrinth organ from temperature shocks caused by breathing in cold, dry air. Additionally, these fish are capable jumpers when startled, and an uncovered tank risks losses.

Water Parameters

Temperature	22 – 28 °C
pH	5.5 – 7.5
General hardness (GH)	2 – 15 dGH
Carbonate hardness (KH)	2 – 10 dKH
Ammonia	0 ppm
Nitrite	0 ppm
Nitrate	Below 20 ppm

The Croaking Gourami is tolerant of a fairly wide range of water conditions, which is one of the reasons it is well suited to beginners. That said, it thrives best in soft to moderately hard, slightly acidic to neutral water. A temperature in the range of 24 to 26 °C represents a comfortable middle ground for long-term keeping. Stability is more important than hitting a precise number; avoid sudden swings in temperature, pH, or hardness, as these can cause stress and leave the fish vulnerable to disease.

Regular partial water changes of 20 to 25 per cent weekly are recommended to keep nitrate levels low and maintain overall water quality. When performing water changes, match the replacement water to the tank’s temperature and chemistry as closely as possible. If you are using tap water, always treat it with a dechlorinator before adding it to the aquarium. Keepers aiming for a biotope-accurate setup can use reverse osmosis (RO) water remineralised to a low GH, combined with botanicals such as catappa leaves and alder cones, to achieve the soft, tannin-rich conditions found in many of the species’ native habitats.

Filtration and Equipment

Croaking Gouramis prefer calm, gentle water flow. In the wild, they inhabit sluggish or still waters, and a strong current in the aquarium will cause stress and may even prevent males from successfully building bubble nests. A sponge filter is an ideal choice, particularly for breeding tanks, as it provides gentle biological filtration without creating excessive flow and poses no risk of trapping fry. For community setups, a small hang-on-back filter or an internal filter with an adjustable flow rate works well. If using a canister filter, ensure the outlet is baffled with a spray bar or lily pipe to reduce the current.

Lighting should be subdued to moderate. The combination of floating plants and low to medium intensity lighting creates the dappled, shaded conditions that encourage the fish to display their best colours and most natural behaviours. Overly bright, unshaded lighting will cause the fish to become shy and washed out in colour. Standard LED aquarium lights on a timer set to 8 to 10 hours per day are sufficient, especially if floating plant cover is present.

A reliable heater with a thermostat is necessary unless the room temperature consistently stays within the species’ preferred range. Use a heater guard if keeping the fish with species that might rest against the heater and suffer burns. A thermometer placed at the opposite end of the tank from the heater helps confirm that the temperature is stable and uniform throughout the aquarium.

Diet and Feeding

Trichopsis vittata is an omnivore with a strong preference for small invertebrates and insect larvae. In the wild, its diet consists primarily of tiny crustaceans, worms, insect larvae, and zooplankton, supplemented by algae and biofilm. In the aquarium, it is generally unfussy and will accept a wide range of foods, though a varied diet is essential for maintaining health, colour, and breeding condition.

A high-quality micro pellet or small granule food designed for small tropical fish or gouramis makes a good staple. Supplement this regularly with frozen or live foods such as daphnia, baby brine shrimp (Artemia nauplii), bloodworm, mosquito larvae, micro worms, and grindal worms. Live foods are particularly valuable for conditioning fish for breeding and for encouraging natural foraging behaviour. Freeze-dried options can be offered occasionally, though they are less nutritious than frozen or live equivalents.

Feed small amounts once or twice daily, offering only what the fish can consume within two to three minutes to avoid overfeeding and the resulting water quality issues. Croaking Gouramis are relatively small fish with modest appetites, so it is better to err on the side of underfeeding than overfeeding. Finely crushed flake food is also accepted, though it should not form the sole diet. Varying the food types across the week helps ensure a full range of nutrients and keeps the fish engaged and active during feeding times.

Behaviour and Temperament

The Croaking Gourami is a peaceful, somewhat shy species that does best in a calm environment with plenty of cover. Its most remarkable behavioural trait is its ability to produce audible sounds. Both males and females can “croak,” though males vocalise far more frequently, particularly during territorial displays and courtship. The sound is produced by a modified pectoral-fin tendon and associated muscles that cause the pectoral fin rays to vibrate against the swimbladder, creating a series of rapid clicks or purring sounds. In a quiet room, these sounds are clearly audible to the human ear, often described as a low clicking, chirping, or croaking noise. This is not a sign of distress – it is a normal and healthy part of the species’ social communication.

Males can be mildly territorial with one another, particularly in smaller tanks with insufficient cover. Displays typically involve spreading the fins, intensifying body coloration, and producing the characteristic croaking sounds. Physical aggression is uncommon and rarely results in injury, provided there is enough space and visual barriers for subordinate fish to retreat. Keeping the species in a group helps diffuse any aggression, as dominant individuals cannot focus on a single target.

Croaking Gouramis tend to occupy the middle and upper levels of the water column, though they will explore all areas of the tank, particularly when foraging. They are not fast swimmers and spend much of their time hovering among plants, investigating surfaces, or resting in sheltered spots. They are naturally inquisitive and will often approach the front glass to observe their keeper, especially once settled in. Despite their peaceful nature, they can be easily intimidated by larger, boisterous tank mates, which may cause them to hide and lose condition.

Tank Mates

The Croaking Gourami’s peaceful and somewhat timid disposition means that tank mates should be chosen with care. Ideal companions are similarly sized, non-aggressive species that will not outcompete the gourami for food or harass it. Avoid anything large enough to view the Croaking Gourami as prey, or any highly active, fin-nipping species that may cause stress. Broadly speaking, small rasboras, peaceful tetras, corydoras catfish, small loaches, and dwarf shrimp (though small shrimp may occasionally be predated upon) all work well. Other anabantoids can be mixed with caution; avoid keeping Croaking Gouramis with significantly larger or more aggressive gourami species.

Good tank mates

Harlequin Rasbora – A peaceful, similarly sized schooling fish from the same geographic region, making an excellent biotope companion.
Chili Rasbora – A tiny, non-competitive nano fish that thrives in the same soft, acidic water conditions.
Ember Tetra – A calm, small tetra that occupies the mid-water without bothering surface-dwelling gouramis.
Pygmy Corydoras – A peaceful bottom-dwelling catfish that stays small and adds activity to the lower tank levels.
Kuhli Loach – A gentle, nocturnal bottom-dweller that coexists peacefully and appreciates similar planted setups.
Sparkling Gourami – A close relative that shares similar care requirements, though some male-to-male posturing between species may occur.
Celestial Pearl Danio – A small, peaceful fish that thrives in planted tanks with gentle flow and subdued lighting.
Amano Shrimp – Large enough to avoid predation, these shrimp are useful algae grazers that are ignored by Croaking Gouramis.

Fish to avoid

Tiger Barb – A notorious fin nipper that will harass the slow-moving, long-finned Croaking Gourami relentlessly.
Oscar – Far too large and predatory; a Croaking Gourami would be viewed as food.
Paradise Fish – A highly territorial anabantoid that will bully and potentially injure Croaking Gouramis.
Convict Cichlid – Aggressive, especially when breeding, and will dominate the tank and stress smaller species.
Chinese Algae Eater – Becomes aggressive and territorial with age and may latch onto the flanks of slow-moving fish.
Giant Gourami – Grows far too large and would easily consume or intimidate a Croaking Gourami.

Breeding

Breeding the Croaking Gourami in captivity is achievable for fishkeepers with some experience, though it requires attention to detail when it comes to tank setup and fry rearing. Like other members of the genus Trichopsis, this species is a bubble nest builder. Males construct small, fragile nests, typically beneath a floating leaf, piece of floating plant, or even cling film placed on the water surface. The nest is less elaborate than those of many Betta species and may be difficult to spot if the tank has dense floating plant cover.

To condition a pair for breeding, provide a varied diet rich in live and frozen foods for two to three weeks. Raise the temperature slightly to the upper end of the comfortable range, around 26 to 28 °C, and ensure the water is soft and slightly acidic (pH 6.0 to 6.5, GH 2 to 6 dGH). A dedicated breeding tank of 20 to 40 litres, equipped with a sponge filter, floating plants, and a tight-fitting lid, is ideal.

When ready to spawn, the male will intensify his coloration and begin croaking frequently to attract the female. Courtship involves the pair circling one another beneath the nest, with the male wrapping his body around the female in a typical anabantoid embrace. The female releases a small number of eggs during each embrace, which are fertilised by the male and then carefully placed into the bubble nest. A single spawning may produce between 50 and 200 eggs, depending on the size and condition of the female.

After spawning, the male assumes sole responsibility for guarding the nest and tending the eggs. The female should ideally be removed at this stage, as the male may become aggressive towards her in defence of the nest. The eggs typically hatch within 24 to 48 hours, and the fry become free-swimming approximately two to three days later. Once the fry are free-swimming, the male should also be removed to prevent accidental predation.

Free-swimming fry are extremely small and require infusoria or a liquid fry food as their first food for the initial few days. After a week or so, they can graduate to freshly hatched baby brine shrimp (Artemia nauplii) and micro worms. Growth is steady but not rapid, and regular small water changes with carefully matched water are essential to maintain water quality without disturbing the tiny fry. Maintaining a warm, humid air layer above the water surface during this period is critical, as the fry are developing their labyrinth organs and exposure to cold air can be fatal.

Common Diseases

The Croaking Gourami is generally a robust species, but like all aquarium fish, it is susceptible to a number of common diseases, particularly when kept in suboptimal conditions or when stressed by poor water quality, aggressive tank mates, or sudden environmental changes.

Ich (White Spot Disease) is one of the most frequently encountered ailments. It presents as small white cysts on the body and fins and is caused by the protozoan parasite Ichthyophthirius multifiliis. Treatment involves gradually raising the temperature to 28 to 30 °C and dosing with a commercially available ich medication. Quarantining new fish before introducing them to an established tank is the best preventive measure.

Velvet disease (Oodinium), caused by the parasitic dinoflagellate Piscinoodinium, is another concern, particularly for labyrinth fish. It presents as a fine, gold or rust-coloured dusting on the body and fins. Affected fish may clamp their fins, become lethargic, and rub against surfaces. Treatment with copper-based medications is effective, though care must be taken with dosing in tanks containing invertebrates.

Bacterial infections, including fin rot and columnaris, can occur in tanks with poor water quality. Symptoms include frayed or eroded fins, white or grey patches on the body, and lethargy. Maintaining excellent water quality through regular water changes and not overcrowding the tank is the best prevention. Antibiotic or antibacterial treatments may be required in more severe cases.

Fungal infections occasionally appear, particularly on fish that have been physically injured or are recovering from another illness. White, cotton-like growths on the body or fins are characteristic. Antifungal medications are widely available and generally effective when used promptly.

Internal parasites can also affect Croaking Gouramis, particularly wild-caught specimens. Signs include weight loss despite a healthy appetite, pale or stringy faeces, and a hollow belly. Anti-parasitic foods or medications added to the water column can address these issues. As a general rule, quarantining all new arrivals for two to four weeks in a separate tank before adding them to an established community greatly reduces the risk of introducing disease.

FAQs

Why is my Croaking Gourami making clicking or purring sounds?

This is completely normal and healthy behaviour. Trichopsis vittata produces audible croaking or clicking sounds using a specialised mechanism involving the pectoral fin tendons and the swimbladder. Males vocalise most frequently during territorial displays and courtship, but females can also produce sounds. It is one of the most distinctive and appealing traits of the species and is not a sign of stress or illness.

Can I keep Croaking Gouramis with Sparkling Gouramis?

Yes, the two species can generally be kept together, as they share similar water parameter requirements and temperaments. However, some male-to-male posturing and croaking displays may occur between males of the two species, as they are closely related. Providing ample plant cover and visual barriers will minimise any territorial friction. Ensure the tank is large enough – at least 80 litres or more – to give each species room to establish its own areas.

How can I tell males from females?

Sexing Croaking Gouramis can be tricky outside of breeding condition. Males tend to be slightly more slender, with more pointed and elongated dorsal and anal fins and more vivid fin coloration, particularly blue and red highlights. Females are generally rounder in the body, especially when gravid. Males also vocalise more frequently and more loudly than females. Observing a group over time and noting fin shape and behaviour is the most reliable method.

Do Croaking Gouramis need a heater?

In most household environments, yes. The species requires a stable temperature of 22 to 28 °C, and few homes maintain this range consistently year-round without supplemental heating. A thermostatically controlled heater appropriately sized for the aquarium is strongly recommended. Additionally, a tight-fitting lid is important to ensure the air layer above the water remains warm and humid for the labyrinth organ.

How many Croaking Gouramis should I keep together?

Croaking Gouramis are social fish and do best in groups of at least four to six individuals. Keeping them in a group allows for natural social interactions, distributes any mild aggression among multiple individuals, and encourages the fascinating vocalisation behaviour that makes the species so appealing. A pair can be kept successfully, but a small group in a well-planted tank of 60 litres or more is the ideal arrangement.

Sparkling Gourami – A smaller and closely related Trichopsis species with similar care requirements and the same remarkable croaking behaviour.
Threestripe Gourami – The third member of the Trichopsis genus, intermediate in size between the Sparkling and Croaking Gouramis, and an equally rewarding species to keep.
Honey Gourami – Another peaceful, small gourami species that thrives in similar planted tank setups and makes a compatible community companion.
Harlequin Rasbora – An ideal tank mate originating from the same Southeast Asian habitats, perfect for a regional biotope aquarium.
Pygmy Corydoras – A gentle bottom-dwelling catfish that complements the Croaking Gourami’s mid to upper water column habits in a community setup.