Pearl gourami: Small Southeast Asian fish with a pearly pattern

The pearl gourami is a small freshwater fish native to lowland swamps in Thailand, Malaysia and Indonesia. It features a distinctive silver body covered in pearl-like spots and a dark lateral line. Males display bright orange throats during breeding.

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Grows to about 12 centimetres in length
Native to acidic lowland swamps in Southeast Asia
Males develop bright orange throats for breeding
Named after collector J. M. van Leer
Features a distinctive pearl-like body pattern

What it is

This species is a small gourami that grows to roughly twelve centimetres in total length. Its body displays a brownish-silver hue overlaid with a pattern resembling pearls. A distinct black stripe runs from the head toward the tail, thinning as it extends. The appearance has earned it alternative names like lace or mosaic gourami. Males are typically larger and more vivid than females, featuring longer fins with pointed dorsal and extended anal rays.

Where it lives

The fish is indigenous to Southeast Asia, specifically found in Thailand, Malaysia and Indonesia. Within Indonesia, its range includes the islands of Sumatra and Borneo. It inhabits lowland swamp environments where the water tends to be acidic. The type specimen was originally collected in Palembang on Sumatra.

How it lives

Male specimens exhibit specific colour changes linked to reproductive behaviour. They develop a bright orange colour around the throat area. This hue intensifies during the breeding season and serves to attract females. The fins of the male also take on an orange tinge, except for the tail fin. These visual cues are central to their courtship rituals.

Breeding and life cycle

During the spawning period, males use their enhanced colouration to court partners. The throat region becomes significantly brighter to signal readiness.

A drawing made by EveryFish from what this page says. It is a diagram, not a picture of the real fish.

Fish and people

The striking appearance of this fish, with its pearl-like markings, makes it popular in the aquarium trade. It is often referred to by descriptive names such as lace or mosaic gourami due to its intricate patterning. The species was named by Pieter Bleeker in honour of his colleague J. M. van Leer.

Questions people ask about Pearl gourami

How large does the pearl gourami grow?

This fish reaches a total length of approximately twelve centimetres. Male specimens are generally larger than females and possess longer, more pointed fins.

Where is the pearl gourami naturally found?

It is native to Southeast Asia, including Thailand, Malaysia and Indonesia. In Indonesia, it lives on the islands of Sumatra and Borneo in lowland swamps.

What kind of water does this fish prefer?

The pearl gourami occurs in lowland swamp habitats. These environments are characterised by acidic water conditions, which suit the natural needs of the species.

Why is it called the lace or mosaic gourami?

These names refer to its appearance. The body is brownish-silver and covered in a pearl-like pattern, with a black line running from head to tail, resembling lace or mosaic work.

Good reading and sources

Where this page comes from

The facts on this page come from the Wikipedia article "Pearl 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.

Pearl gourami