劳氏南鳅

Overview

Schistura robertsi is a small stream loach from the western Malay Peninsula. Adult bars are fairly regular, while juveniles can look more irregular. It may have entered trade mixed with similar fishes, so origin and morphology deserve attention.

Distribution & habitat

Records extend from Myanmar's Tanintharyi region into southern Thailand, including Phuket, and Malaysia's Langkawi islands. Shallow, narrow stream branches have sand, gravel, or stone bottoms. Some sites alternate between wider slow reaches and narrower fast riffles rather than maintaining one constant flow pattern.

Aquarium setup

Use sand, gravel, smooth stones, and branches to form multiple shaded gaps and broken sightlines. Hardy epiphytic plants can be attached. High oxygen availability and suitable circulation are important without requiring extreme torrents.

Maintain effective filtration and regular weekly partial changes because accumulated organic pollution is poorly tolerated. Plentiful structure also allows fish to withdraw after disputes.

Diet & feeding

Related loaches take mainly small animal prey with lesser plant material and detritus. Combine appropriate dry foods with daily small live or frozen items such as water fleas, brine shrimp, and bloodworms.

Behaviour & compatibility

Avoid slow fishes, trailing fins, and excessively placid bottom dwellers. Similar-shaped loaches can be problematic. Peaceful open-water cyprinids from flowing habitats and compatible hillstream loaches are better possibilities.

A group can coexist in a structured aquarium, although the species is not tightly social. Disputes may intensify in small or exposed layouts. Relative tolerance compared with some congeners does not mean that aggression is absent.

Sexual dimorphism

A dependable external distinction is not established. Mature females may be rounder, particularly when carrying eggs. Males lack the suborbital flap present in some related loaches, so that character cannot be borrowed for sexing this species.

Notes

Adults typically show eight to ten bars wider than the pale gaps, an incomplete lateral line, and a dark tail-base band. Juvenile markings can be irregular and later fuse, making one photograph an incomplete basis for identification. Aquarium reproduction is unrecorded.