HomeFish encyclopediaRay-finned fishesPerch-like fishEmperors or scavengersSlender emperor Slender emperor (Lethrinus variegatus) Scientific name: Lethrinus variegatus Valenciennes, 1830 The Slender emperor (Lethrinus variegatus) is a marine fish of the family Lethrinidae. BiologyDorsal spines (total): 10; Dorsal soft rays (total): 9; Anal spines: 3; Anal soft rays: 8. Body is brown and gray (usually green, ), becoming lighter ventrally, with scattered irregular dark spots. Often there are two dark bands below the eye, one at the lower rim or the opercle and one at the corner of the mouth. The fins are generally light or translucent; the caudal fin is light and dark striped.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameLethrinus variegatusFamilyLethrinidae (Emperors or scavengers)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length20.0Depth range150 m (492 ft)EnvironmentMarine; reef-associated; non-migratory; depth range ? - 150 mClimateTropicalDistributionIndo-West Pacific: Red Sea and East Africa to the Ryukyu Islands and New Caledonia. Recently reported from Tonga. Also reported from French Polynesian islands but this is a misidentification of Lethrinus rubrioperculatus.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceLow, minimum population doubling time 4.5 - 14 years (tmax=15) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026