HomeFish encyclopediaRay-finned fishesFlatfishesRighteye floundersSlender sole Slender sole (Lyopsetta exilis) Scientific name: Lyopsetta exilis Jordan & Gilbert, 1880 The Slender sole (Lyopsetta exilis) is a marine fish of the family Pleuronectidae. Native range: Eastern Pacific, Alsek Canyon, southeastern Alaska to Isla Cedros, central Baja California, Mexico. BiologyDorsal spines (total): 0; Dorsal soft rays (total): 72-78; Anal spines: 0; Anal soft rays: 57 - 65; Vertebrae: 42 - 46. Dorsal origin over anterior part of upper eye. Caudal rounded. Pectorals small and narrow.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameLyopsetta exilisFamilyPleuronectidae (Righteye flounders)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length35.0Depth range25–800 m (82–2625 ft)EnvironmentMarine; bathydemersal; depth range 25 - 800 mClimateDeep-waterDistributionEastern Pacific: Alsek Canyon, southeastern Alaska to Isla Cedros, central Baja California, Mexico.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: minor commercial; gamefish: yesResilienceLow, minimum population doubling time 4.5 - 14 years (tmax=20; tm=4) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026