HomeFreshwater aquarium fishCatfish & plecosDay's mystus Day's mystus (Mystus bleekeri) Scientific name: Mystus bleekeri Day, 1877 The Day's mystus (Mystus bleekeri) is a freshwater fish of the family Bagridae. In the aquarium it needs water at 18–26°C (64–79°F). Native range: Asia, Pakistan, India, Bangladesh, Nepal, Myanmar and Indonesia. Also Bhutan. Day's mystus care at a glanceTemperature18–26°C (64–79°F) BiologyFound in lakes, tanks, rivers, canals and beels. Oviparous, distinct pairing possibly like other members of the same family. Caught with other fishes from fishing operations.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMystus bleekeriFamilyBagridae (Bagrid catfishes)OrderSiluriformes (Catfish)ClassActinopterygii (Ray-finned fishes)Maximum length15.5EnvironmentFreshwater;; pH range: 5.8 - 8.0; dH range: ? - 30 demersal; potamodromousClimateTropicalDistributionAsia: Pakistan, India, Bangladesh, Nepal, Myanmar and Indonesia. Also Bhutan.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: minor commercial; aquarium: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming Fec More catfish & plecosLeporacanthicus galaxiasWidehead catfishClarotes laticepsAtipaHoplosternum littoraleLeporacanthicus triactisPterygoplichthys scrophusPterygoplichthys joselimaianusSee all catfish & plecos SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026