HomeFish encyclopediaRay-finned fishesHerringsHerrings, shads and sardinesTardoore Tardoore (Opisthopterus tardoore) Scientific name: Opisthopterus tardoore Cuvier, 1829 The Tardoore (Opisthopterus tardoore) is a brackish-water fish of the family Clupeidae. BiologyDorsal spines (total): 0; Anal spines: 0; Anal soft rays: 51 - 63. Belly convex in front, with 29 to 35 scutes. Mouth pointing obliquely upward; lower gill rakers 22 to 28, increasing with size of fish. Pectoral fin usually about equal to head length or greater; dorsal fin small, well behind midpoint of body; anal fin long, its origin well before dorsal fin origin.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOpisthopterus tardooreFamilyClupeidae (Herrings, shads and sardines)OrderClupeiformes (Herrings)ClassActinopterygii (Ray-finned fishes)Maximum length20.0EnvironmentMarine; brackish; pelagic-neritic; amphidromousClimateTropicalDistributionIndo-West Pacific: in tropical waters, from the Gulf of Oman to at least Madras, perhaps to the north and along the coasts of Myanmar, certainly at Penang, to the Java Sea, and Gulf of Thailand.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