HomeFish encyclopediaRay-finned fishesPerch-like fishDamselfishesPanamic sergeant major Panamic sergeant major (Abudefduf troschelii) Scientific name: Abudefduf troschelii Gill, 1862 The Panamic sergeant major (Abudefduf troschelii) is a marine fish of the family Pomacentridae. BiologyDorsal spines (total): 13; Dorsal soft rays (total): 12-13; Anal spines: 2; Anal soft rays: 10 - 13. With black spot on pectoral fin base.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAbudefduf troscheliiFamilyPomacentridae (Damselfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length20.0Common length10.0Depth range1–12 m (3–39 ft)EnvironmentMarine; reef-associated; non-migratory; depth range 1 - 12 mClimateTropicalDistributionEastern Pacific: throughout the Gulf of California and from Bah?a San Juanico, Baja California, Mexico to northern Peru, the Galapagos Islands and other offshore islands.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries:ResilienceMedium, minimum population doubling time 1.4 - 4.4 years (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