HomeFish encyclopediaSharks and RaysGround sharksRequiem sharksIrrawaddy river shark Irrawaddy river shark (Glyphis siamensis) Scientific name: Glyphis siamensis Steindachner, 1896 The Irrawaddy river shark (Glyphis siamensis) is a brackish-water fish of the family Carcharhinidae. Native range: Eastern Indian Ocean, Myanmar. Species factsScientific nameGlyphis siamensisFamilyCarcharhinidae (Requiem sharks)OrderCarcharhiniformes (Ground sharks)ClassElasmobranchii (Sharks and Rays)EnvironmentMarine; brackish; demersalClimateTropicalDistributionEastern Indian Ocean: Myanmar.Conservation status (IUCN)Critically Endangered (CR) (B1ab(iii,v))Threat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (Assuming fecundity SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026