HomeFreshwater aquarium fishPuffers, gobies & brackish fishSlender glassy Slender glassy (Ambassis natalensis) Scientific name: Ambassis natalensis Gilchrist & Thompson, 1908 The Slender glassy (Ambassis natalensis) is a freshwater fish of the family Ambassidae. Native range: Western Indian Ocean, Natal to Algoa Bay in South Africa. Reported from east Africa, including Madagascar. BiologyTolerant of freshwater within a temperature range of 19-27?C. In summer, feeds mainly in early evening and late morning while in winter, it feeds both day and night on crustaceans as well as insects (aquatic and terrestrial) and fish. Excellent subject for biological research as it easily thrives in captivity.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAmbassis natalensisFamilyAmbassidae (Asiatic glassfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length9.0EnvironmentMarine; freshwater; brackish; demersalClimateSubtropicalDistributionWestern Indian Ocean: Natal to Algoa Bay in South Africa. Reported from east Africa, including Madagascar.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interest; aquarium: commercial; bait: usuallyResilienceHigh, minimum population doubling time less than 15 months (Assuming Fec > 10,000) More puffers, gobies & brackish fishBanded archerfishToxotes jaculatrixSilver moonyMonodactylus argenteusRhinogobius duospilusGlobe fishTetraodon lineatusAmazon pufferColomesus asellusSpotted scatScatophagus argusSee all puffers, gobies & brackish fish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026