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The Chocolate Gourami is a beautiful and distinctive freshwater fish admired for its rich chocolate-brown colouration, delicate patterning, and peaceful nature. Native to the slow-moving, heavily vegetated waters of Southeast Asia, Chocolate Gouramis are a fascinating labyrinth fish that thrive in mature, well-planted aquariums with soft, acidic water.
Known for their shy and gentle temperament, Chocolate Gouramis are best suited to peaceful community aquariums or species-specific setups. Their specialised water requirements make them more sensitive than many other gourami species, so they are recommended for aquarists who can provide stable, high-quality water and a well-established aquarium.
Quick Facts
Common Name: Chocolate Gourami
Scientific Name: Sphaerichthys osphromenoides
Family: Osphronemidae
Origin: Southeast Asia, particularly Malaysia, Sumatra and Borneo
Care Level: Moderate to Advanced
Temperament: Peaceful
Diet: Omnivore
Minimum Tank Size: 60 litres
Adult Size: 5–6 cm
Lifespan: 4–6 years
Appearance
The Chocolate Gourami has a compact, laterally compressed body covered in rich chocolate-brown to dark reddish-brown colouration. Several lighter vertical bands extend across the body, creating an attractive striped appearance. The intensity of their colours can vary depending on their mood, health, water quality, and surroundings.
Their small, rounded fins and relatively short body give them a delicate appearance, while their large eyes and distinctive body markings make them particularly appealing in a planted aquarium.
Males and females can be difficult to distinguish, although females are often slightly larger and fuller-bodied. During breeding and courtship, their colouration can become especially vivid.
Temperament
Chocolate Gouramis are peaceful, shy, and generally slow-moving fish. They can be easily intimidated by larger, boisterous, or highly active tank mates and are best kept with other calm species.
They are naturally social and often feel more secure when kept in a small group. Providing plenty of vegetation and hiding places helps reduce stress and allows them to display more natural behaviour.
Suitable tank mates include:
Avoid keeping them with:
Aquarium Requirements
Chocolate Gouramis thrive in mature, heavily planted aquariums that replicate their natural blackwater environment. Use driftwood, leaf litter, dense plants, floating vegetation, and shaded areas to create a secure environment.
They prefer gentle water movement and should not be subjected to strong filtration currents. Floating plants are particularly beneficial as they diffuse lighting and provide additional cover.
Chocolate Gouramis are labyrinth fish and can breathe atmospheric air using their specialised labyrinth organ. They should therefore have access to the water's surface, with a secure lid recommended to maintain warm, humid air above the aquarium.
These fish are particularly sensitive to sudden changes in water chemistry, poor water quality, and high levels of waste. A mature, biologically stable aquarium is strongly recommended.
Recommended Water Parameters
Temperature: 25–30°C
pH: 4.5–6.5
Hardness: 0–5 dGH
Soft, acidic, tannin-rich water is ideal. Maintaining stable parameters is more important than constantly attempting to achieve a specific number, particularly once the fish are settled into the aquarium.
Diet
Chocolate Gouramis are omnivorous but can be somewhat particular feeders. Providing a varied, high-quality diet is important for maintaining their health and encouraging natural behaviour.
Recommended foods include:
Small foods are preferable due to their relatively small mouths. Newly introduced Chocolate Gouramis may take time to accept prepared foods, so offering live or frozen foods can help encourage feeding.
Feed small portions once or twice daily, ensuring that uneaten food does not accumulate and compromise water quality.
Behaviour
Chocolate Gouramis are peaceful, shy, and fascinating to observe. They spend much of their time moving slowly through dense vegetation, exploring shaded areas, and interacting with members of their group.
They may become noticeably more confident once settled into a mature aquarium. Their colouration can change depending on mood and social interactions, with stronger contrast often displayed during courtship or periods of excitement.
Because of their timid nature, they should not be housed with fish that constantly outcompete them for food or disturb them with excessive activity.
Breeding
Chocolate Gouramis have an unusual breeding strategy compared with many other gourami species. They are mouthbrooders, with the female generally taking responsibility for carrying the eggs and developing young inside her mouth.
Courtship takes place in calm, sheltered areas of the aquarium. Following spawning, the female carries the eggs in her mouth until the fry are sufficiently developed to be released.
Successful breeding requires excellent water quality, suitable soft and acidic conditions, minimal stress, and a peaceful environment. Because the adults and developing fry can be sensitive, breeding is best attempted by experienced aquarists.
Why Choose Chocolate Gouramis?
Care Tips
Provide Chocolate Gouramis with a mature, heavily planted aquarium containing driftwood, leaf litter, floating plants, and plenty of shaded areas. Keep water soft, warm, acidic, and extremely stable, with gentle filtration and regular maintenance.
Avoid sudden changes in water chemistry and ensure they are housed with peaceful tank mates that will not outcompete them for food. Offer a varied diet of appropriately sized foods and pay close attention to feeding behaviour, particularly when newly introduced.
With excellent water quality, a calm environment, and suitable tank mates, Chocolate Gouramis can become a beautiful and rewarding feature of a mature freshwater aquarium.
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