HomeFish encyclopediaRay-finned fishesPerch-like fishGobiesMiller's damsel Miller's damsel (Asterropteryx ensifera) Scientific name: Asterropteryx ensifera Bleeker, 1874 The Miller's damsel (Asterropteryx ensifera) is a brackish-water fish of the family Gobiidae. Native range: Indo-Pacific, Red Sea to the Society Islands north to Yaeyama Islands, south to New Guinea; Marshall Islands in Micronesia. BiologyDorsal spines (total): 7; Dorsal soft rays (total): 10; Anal spines: 1; Anal soft rays: 9. Differs from A. semipunctata by having a single spine on the preopercular margin.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAsterropteryx ensiferaFamilyGobiidae (Gobies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length3.0Depth range6–40 m (20–131 ft)EnvironmentMarine; brackish; reef-associated; depth range 6 - 40 mClimateTropicalDistributionIndo-Pacific: Red Sea to the Society Islands north to Yaeyama Islands, south to New Guinea; Marshall Islands in Micronesia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, 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