HomeFish encyclopediaRay-finned fishesPerch-like fishDrums or croakersSmall-mouth croaker Small-mouth croaker (Johnius hypostoma) Scientific name: Johnius hypostoma Bleeker, 1853 The Small-mouth croaker (Johnius hypostoma) is a marine fish of the family Sciaenidae. Native range: Indo-Pacific, Known only from Indonesia. BiologyDorsal spines (total): 9 - 11; Dorsal soft rays (total): 31-33; Anal spines: 2; Anal soft rays: 7Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameJohnius hypostomaFamilySciaenidae (Drums or croakers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length12.0Common length10.0EnvironmentMarine; benthopelagicClimateTropicalDistributionIndo-Pacific: Known only from Indonesia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceHigh, minimum population doubling time less than 15 months (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