Glaniopsis is a small genus of hillstream loaches (family Balitoridae/Gastromyzontidae, depending on the classification used) native to fast, well-oxygenated streams on Borneo, recorded in the atlas from Brunei, Malaysia and Indonesia. Like other hillstream loaches, the body is flattened and the paired fins spread wide to act as suckers and stabilizers, letting the fish cling to rock faces and hold station in current that would sweep a typical fish downstream. The atlas covers 4 species, ranging from roughly 1.5–4 in, all found in clear, cool, tumbling hill and montane streams rather than lowland rivers.
Glaniopsis species are seen only occasionally in the aquarium hobby and are mostly of interest to specialists who keep dedicated hillstream setups — a shallow tank with strong, well-aerated flow, cool water, and a hard, rocky substrate that mimics a mountain stream. They graze algae and biofilm off rock surfaces and pick at small invertebrates, and do poorly in still, warm water where their oxygen demand and current-adapted anatomy work against them. Conservation data are thin for the genus: the atlas tally runs three Least Concern to one Data Deficient, suggesting most species are considered stable where they have been assessed but remain under-studied overall.