Kabi Rainbowfish

Adult fish reach 8 cm in length and display distinctive graduated colouration. The upper body has greenish or bluish-silver tones. Below, on the belly, orange appears as bright orange stripes, most vivid on the belly and less pronounced on the back.

The kabi rainbowfish lives in the Sepik and Ramu river systems on the island of New Guinea. In nature it inhabits floodplain waters, swampy lagoons, lakes and small tributaries. It prefers areas with dense aquatic vegetation where the water ranges from clear to moderately turbid and flow is absent or very weak. Young fish often gather in groups near submerged driftwood, branches or among shoreline reed beds.

This peaceful, active fish lives well with its own kind and with other rainbowfish species. A school of 6–8 individuals is recommended. Other fish of comparable size and temperament make suitable tank mates.

The kabi rainbowfish needs a tank of at least 100–110 L. Simple décor works best: plant growth and driftwood shelters are beneficial. The fish adapts readily to varied conditions and is easy to keep. Maintenance is standard: maintain water quality with appropriate pH and dGH, and feed regularly. The diet can consist of common dried, frozen and freeze-dried foods.

A basic diet of common dried, frozen and freeze-dried foods is suitable.

Spawning occurs year-round, though it is less intense during the dry season. The fish lay eggs among fine-leaved plants. Eggs are relatively small, which allows higher fertility compared to other rainbowfish species. Fry appear within days and require fine starter food. For successful breeding, keep a group with more females than males.

The kabi rainbowfish is sensitive to poor water quality and accumulation of organic waste, which can trigger bacterial infections and fin damage. Diseases typical of Melanotaeniidae occur, such as white spot disease or velvet when stressed or following abrupt changes. Prevention includes regular water changes, stable conditions and adequate diet.

When buying, choose active fish with clean fins and unblemished scales. A healthy fish shows interest in food and displays the characteristic bright colouration of its kind. Avoid specimens showing signs of starvation, sunken bellies or lethargy. Young fish are preferable as they adapt to tank conditions more readily than wild-caught adults.