HomeFish encyclopediaRay-finned fishesPerch-like fishAsiatic glassfishesSailfin glass perchlet Sailfin glass perchlet (Ambassis agrammus) Scientific name: Ambassis agrammus G?nther, 1867 The Sailfin glass perchlet (Ambassis agrammus) is a freshwater fish of the family Ambassidae. In the aquarium it needs water at 22–38°C (72–100°F). Sailfin glass perchlet care at a glanceTemperature22–38°C (72–100°F) BiologyFound in streams, ponds, and swamps. Inhabits rivers and creeks flowing through rainforest, sometimes in stagnant pools or slowly flowing rivulets. Also occurs along the margins of swamps and lakes. Usually forms large aggregations that shelter among aquatic vegetation. The breeding season coincides with the onset of monsoonal spring rains. Feeds on micro-crustaceans, insects, small arachnids, fish and algae.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAmbassis agrammusFamilyAmbassidae (Asiatic glassfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length7.5Common length4.5EnvironmentFreshwater; brackish; demersalClimateTropicalDistributionOceania: Two isolated populations, Northern Territory coastal streams from Victoria River to McArthur River and Cape York Peninsula, Queensland north of about 15?S. Also recorded from central southern New Guinea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (tm=1) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026