Half-banded Kuhli Loach

Adults reach 9 to 10 cm in length. The body is elongated and snake-like, with small fins and a distinctive tail. Sensitive barbels around the mouth help them find food in soft substrate. The coloration is brown, the belly is yellowish-white, and the body is marked with rings. Males and females are difficult to tell apart, as sexual dimorphism is not pronounced.

This species is native to Southeast Asia, including peninsular Malaysia and large Sunda Islands such as Sumatra and Borneo. They prefer shallow waters: old oxbow lakes, swamps, and shaded forest streams. They thrive in areas with stagnant water, dense aquatic vegetation for shelter, and soft, silted substrate or leaf litter to hide in.

The half-banded kuhli loach is peaceful and calm, coexisting well with its own kind and with other fish of similar size and temperament. In nature they often live in large groups, so keep at least 5–6 in the aquarium.

A group of 4–5 fish requires a tank of at least 50 litres. Use soft sandy substrate, as the half-banded kuhli loach will actively sift through it. Provide some driftwood to form hideouts and small caves, with shade-loving plants nearby. Indian almond leaves help recreate natural conditions. Keep lighting dimmed, and floating plants provide extra shade. Minimize water flow. Maintain stable conditions with weekly partial water changes (keeping pH and dGH the same) and regular removal of decaying plant matter, uneaten food, and waste.

In nature these fish eat small crustaceans, insects and their larvae, and plant debris, which they find by sifting substrate. In the aquarium offer sinking foods such as dry flakes, pellets, and frozen bloodworms, daphnia, and brine shrimp.

Breeding is seasonal. Changes in water chemistry trigger spawning. However, breeding this loach in the aquarium is quite difficult. There are no reliable reports of successful captive breeding of the half-banded kuhli loach.

Health problems occur mainly after injury or in unsuitable conditions, which weakens the immune system and leads to disease. At the first sign of illness, check water parameters for excess toxic substances (nitrite, nitrate, ammonia). Correct any imbalances, then treat.

When selecting a half-banded kuhli loach, choose active individuals at dusk or in dimmed light. A healthy fish has clean skin with no visible damage, sores, spots, or signs of wasting. Check that the barbels are intact; their absence or damage usually indicates poor past care. Avoid fish showing lethargy, lying on their side, or behaving unusually during the day without good reason. Inspect the skin carefully, as their small scales make them very prone to bacterial and fungal infection. Look for signs of stress, such as erratic dashing around the tank, which may indicate poor water quality in the seller's tank.