HomeFish encyclopediaRay-finned fishesPerch-like fishDrums or croakersSmall kob Small kob (Johnius dorsalis) Scientific name: Johnius dorsalis Peters, 1855 The Small kob (Johnius dorsalis) is a brackish-water fish of the family Sciaenidae. Species factsScientific nameJohnius dorsalisFamilySciaenidae (Drums or croakers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length40.0Common length20.0EnvironmentMarine; brackish; demersalClimateTropicalDistributionWestern Indian Ocean: Kenya to South Africa and Madagascar. Previously referred to as Johnius dussumieri, which is restricted from Pakistan east to the Andaman Islands.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercial; gamefish: yesResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026