Moonlight Gourami

The Moonlight Gourami is native to the Mekong River basin, including parts of Thailand, Cambodia, Laos, and Vietnam, where it inhabits floodplains, canals, and slow-flowing rivers. It is named for the soft, luminous silvery-green sheen of its body, which lacks the dark spots or mottled patterns common in many related gourami species, giving it a smooth, moonlit appearance. Its most striking feature is a pair of long, bright orange-red, thread-like pelvic fins that contrast vividly against the pale body. Like other members of its family, it is a labyrinth fish capable of breathing atmospheric air, an adaptation to the seasonally low-oxygen floodplain waters it inhabits. It grows to a moderate size among gouramis, typically reaching around 12-15 cm.

• Elongated, laterally compressed body with a uniform silvery-green base color and subtle bluish iridescence
• Notably lacks the dark spots or mottled bars present in many related Trichopodus species
• Bright orange-red, long, thread-like pelvic fins that stand out sharply against the pale body
• Pointed dorsal fin and elongated anal fin, taller and more pointed in males
• Eye is often a striking pale blue to silvery color, contributing to the "moonlight" impression
• Distinguished from the Three Spot Gourami primarily by the absence of dark body spotting and the vivid pelvic fin coloration

Moonlight Gouramis are native to the Mekong River basin across Thailand, Cambodia, Laos, and Vietnam, inhabiting floodplains, canals, oxbow lakes, and slow-moving stretches of river. They favor warm, still to gently flowing freshwater with abundant vegetation, and like other gouramis rely on a labyrinth organ to breathe air directly from the surface, an adaptation well suited to the seasonally low-oxygen conditions of floodplain habitats during the dry season. The species often moves between flooded forest and grassland during the monsoon and retreats to permanent water bodies such as canals and river channels as floodwaters recede, a pattern typical of many Mekong basin fish.

Moonlight Gouramis are relatively peaceful, moderately active fish that forage through the water column and near the surface for insects, small crustaceans, worms, and plant matter, reflecting their omnivorous diet. As labyrinth breathers, they regularly rise to gulp air at the surface. Males become territorial during the breeding season, constructing bubble nests among floating vegetation or debris and performing a courtship display to draw females beneath the nest. Following an embrace-style spawning, the male collects the buoyant eggs into the nest and guards both eggs and fry closely, chasing off intruders until the young fish disperse and become independent.