HomeFish encyclopediaRay-finned fishesPerch-like fishDamselfishesWhitetail major Whitetail major (Stegastes leucorus) Scientific name: Stegastes leucorus Gilbert, 1892 The Whitetail major (Stegastes leucorus) is a marine fish of the family Pomacentridae. Native range: Eastern Central Pacific, Mexico, including the Revillagigedo and Guadalupe islands. BiologyDorsal spines (total): 12; Dorsal soft rays (total): 14-16; Anal spines: 2; Anal soft rays: 12 - 14. Usually with 16 dorsal spines and 12 gill rakers on the lower limb of the first arch.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameStegastes leucorusFamilyPomacentridae (Damselfishes)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length14.0Depth range1–15 m (3–49 ft)EnvironmentMarine; reef-associated; non-migratory; depth range 1 - 15 mClimateTropicalDistributionEastern Central Pacific: Mexico, including the Revillagigedo and Guadalupe islands.Conservation status (IUCN)Vulnerable (VU) (D2)Threat to humansHarmlessResilienceLow, minimum population doubling time 4.5 - 14 years (tmax=19) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026