HomeFreshwater aquarium fishLoachesMesonoemacheilus triangularis Mesonoemacheilus triangularis Scientific name: Mesonoemacheilus triangularis Day, 1865 Mesonoemacheilus triangularis is a freshwater fish of the family Balitoridae that grows to about 5.8 cm (2.3 in). It is easy to keep and semi-aggressive and needs a tank of at least 115 L (30 US gal), water at 20–26°C (68–79°F) and a pH of 7.0–7.5. Native range: Asia, Kerala and Kanyakumari District of Tamil Nadu in India. Mesonoemacheilus triangularis care at a glanceCare levelEasyTemperamentSemi-aggressiveAdult size5.8 cm (2.3 in)Minimum tank115 L (30 US gal)Temperature20–26°C (68–79°F)pH7.0–7.5Hardness6–12 dGH (107–214 ppm)DietOmnivore. Accepts frozen foods and live foods. Species factsScientific nameMesonoemacheilus triangularisFamilyBalitoridae (River loaches)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length5.8EnvironmentFreshwater;; pH range: 7.0 - 7.5 demersalClimateTropicalDistributionAsia: Kerala and Kanyakumari District of Tamil Nadu in India.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interest; aquarium: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (tm=2) More loachesBlyth's loachSyncrossus berdmoreiAcanthocobitis rubidipinnisAborichthys kempiAborichthys elongatusSchistura balteataVaillantella maassiSee 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