HomeFish encyclopediaRay-finned fishesPerch-like fishDamselfishesSlender reef-damsel Slender reef-damsel (Pomachromis exilis) Scientific name: Pomachromis exilis Allen & Emery, 1973 The Slender reef-damsel (Pomachromis exilis) is a marine fish of the family Pomacentridae. Native range: Western Central Pacific, known only from the Marshall Islands and Caroline Islands. BiologyDorsal spines (total): 14; Dorsal soft rays (total): 12-13; Anal spines: 2; Anal soft rays: 12 - 13. This species is light green with a distinctive elongate dark blotch on the caudal peduncle and a large black spot on the upper pectoral axil.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePomachromis exilisFamilyPomacentridae (Damselfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length5.0Depth range3–12 m (10–39 ft)EnvironmentMarine; reef-associated; non-migratory; depth range 3 - 12 mClimateTropicalDistributionWestern Central Pacific: known only from the Marshall Islands and Caroline Islands.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