HomeFish encyclopediaRay-finned fishesHerringsAnchoviesMoustached thryssa Moustached thryssa (Thryssa mystax) Scientific name: Thryssa mystax Bloch & Schneider, 1801 The Moustached thryssa (Thryssa mystax) is a brackish-water fish of the family Engraulidae. Native range: Indo-West Pacific, western coast of India to Myanmar and south to Java, Indonesia. BiologyFound in coastal pelagic waters and often observed as entering mangroves and adjacent brackish waters. Juveniles and adults may penetrate the upper reaches where mixohaline-mesohaline conditions prevail. Eggs and larvae are found in the lower reaches of the mangroves. A schooling species found mostly inshore. Feed on planktonic organisms in coastal waters. Juveniles in mangroves feed on larvae of shrimps and fish. Confusions in identification make all previous biological studies unreliable. One of the commonest species of Thryssa (if identifications have been correct).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameThryssa mystaxFamilyEngraulidae (Anchovies)OrderClupeiformes (Herrings)ClassActinopterygii (Ray-finned fishes)Maximum length15.5Depth range0–50 m (0–164 ft)EnvironmentMarine; brackish; pelagic-oceanic; oceanodromous; depth range 0 - 50 mClimateTropicalDistributionIndo-West Pacific: western coast of India to Myanmar and south to Java, Indonesia.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: commercialResilienceHigh, minimum population doubling time less than 15 months (K=0.76) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026