HomeFreshwater aquarium fishLoachesHomaloptera zollingeri Homaloptera zollingeri Scientific name: Homaloptera zollingeri Bleeker, 1853 Homaloptera zollingeri is a freshwater fish of the family Balitoridae that grows to about 10 cm (3.9 in). It is difficult to keep and peaceful and needs a tank of at least 115 L (30 US gal), water at 21–24°C (70–75°F) and a pH of 6.0–6.5. Native range: Southeast Asia, Mekong and Chao Phraya river basins, Malay Peninsula and Indonesia. Homaloptera zollingeri care at a glanceCare levelDifficultTemperamentPeacefulAdult size10 cm (3.9 in)Minimum tank115 L (30 US gal)Temperature21–24°C (70–75°F)pH6.0–6.5DietOmnivore. Accepts flakes, sinking pellets, frozen foods and brine shrimp. BiologyWith 4-5 simple pectoral rays; belly in front of posterior extremity of pelvic fins is naked only between pectoral fin bases. Scales keeled; color very dark to black with indistinct blotches. Base of caudal and lower lobe black, upper lobe hyaline.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHomaloptera zollingeriFamilyBalitoridae (River loaches)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length10.0EnvironmentFreshwater; demersalClimateTropicalDistributionAsia: Mekong and Chao Phraya basins, Malay Peninsula and Indonesia.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesAquarium: potentialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More loachesVaillantella maassiHomaloptera orthogoniataGastromyzon ctenocephalusAborichthys elongatusAborichthys kempiAcanthocobitis rubidipinnisSee all loaches SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0. Aquarium care parameters compiled, checked and converted to metric and imperial units by Guppies.za.net.Last updated 28 September 2026