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Chocolate gourami

Chocolate gourami

Small maternal mouthbrooding fish from Southeast Asian peat swamps

The chocolate gourami is a small freshwater fish native to the Malay Peninsula, Sumatra and Borneo. It lives in peat habitats and is known for its unique maternal mouthbrooding behaviour where females carry eggs.

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  • Females carry eggs in their mouths
  • Lives only in peat swamp habitats
  • Reaches a maximum length of 6 cm
  • Prefers soft acidic water at 25-27 C
  • Native to Malay Peninsula and Borneo

What it is

The chocolate gourami is a small species of labyrinth fish distinguished by its rich brown colouration and vertical golden bands along the flanks. Adults reach a maximum length of six centimetres. It belongs to the gourami family and is native to Southeast Asia. The fish is visually striking due to its dark body contrasted with lighter stripes, resembling the confectionery after which it is named.

Where it lives

This species is found in the wild across the Malay Peninsula, as well as the islands of Sumatra and Borneo. Its distribution is tightly linked to specific ecological conditions, as it is restricted almost entirely to peat swamp habitats. These environments typically feature soft, acidic water with low mineral content, which shapes the physiological requirements of the fish throughout its life cycle.

How it lives

The chocolate gourami feeds on a varied diet but shows a strong preference for insects. While classified as omnivorous, animal protein forms the bulk of its nutritional intake. In captivity, it can be a fussy eater, often rejecting standard flake foods in favour of live, frozen or freeze-dried alternatives. It requires stable water conditions to avoid bacterial infections and skin parasites, thriving best in gentle filtration systems.

Breeding and life cycle

Reproduction in this species is unusual among labyrinth fishes. Instead of building bubble nests to protect their eggs, chocolate gouramis are mouthbrooders. Specifically, they exhibit maternal mouthbrooding, meaning the female carries the fertilised eggs and young larvae in her mouth until they are developed enough to survive independently. This contrasts with most other anabantoid mouthbrooders, where the male performs this duty.

Fish and people

Aquarists value the chocolate gourami for its unique appearance and breeding behaviour, though it is considered challenging to maintain. Success requires replicating its natural peat swamp environment with soft, acidic water and temperatures between 25 and 27 degrees Celsius. Due to its sensitivity to poor water quality and specific dietary needs, it is best suited for experienced keepers who can provide a well-planted tank with minimal competition.

Questions people ask about Chocolate gourami

Why is the chocolate gourami hard to keep?

It requires very specific water conditions, including soft acidic water and higher temperatures than most tropical fish. It is also prone to bacterial infections and parasites if water quality drops, and it often refuses standard flake foods.

How does the chocolate gourami breed?

Unlike many gouramis that use bubble nests, this species is a maternal mouthbrooder. The female incubates the eggs and young larvae in her mouth, protecting them until they are ready to fend for themselves.

What does the chocolate gourami eat?

Although omnivorous, it primarily feeds on insects. In aquariums, it prefers live, frozen or freeze-dried foods over dry flakes, making it a somewhat fussy eater that needs varied nutrition.

Good reading and sources

Where this page comes from

The facts on this page come from the Wikipedia article "Chocolate gourami", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.

It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.

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The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.

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