HomeFreshwater aquarium fishLoachesGastromyzon ctenocephalus Gastromyzon ctenocephalus Scientific name: Gastromyzon ctenocephalus Roberts, 1982 Gastromyzon ctenocephalus is a freshwater fish of the family Balitoridae that grows to about 4.5 cm (1.8 in). It is difficult to keep and peaceful and needs a tank of at least 75 L (20 US gal), water at 18–24°C (64–75°F) and a pH of 7.0. Native range: Asia, Western Borneo. Gastromyzon ctenocephalus care at a glanceCare levelDifficultTemperamentPeacefulAdult size4.5 cm (1.8 in)Minimum tank75 L (20 US gal)Temperature18–24°C (64–75°F)pH7.0DietOmnivore. Accepts flakes, sinking pellets, frozen foods and brine shrimp. BiologyDorsum of body with fine cream spots; pectoral fin rays 27-29; caudal peduncle length 7.2-9.7% SL; anal fin base length 7.2-9.3% SL; and snout length 60.9-69.0% HL.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameGastromyzon ctenocephalusFamilyBalitoridae (River loaches)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length4.5EnvironmentFreshwater; demersalClimateTropicalDistributionAsia: western Borneo.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More loachesHomaloptera orthogoniataVaillantella maassiAborichthys elongatusAborichthys kempiAcanthocobitis rubidipinnisBlyth's loachSyncrossus berdmoreiSee 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