HomeFish encyclopediaRay-finned fishesFlatfishesLefteye floundersBrown lefteye flounder Brown lefteye flounder (Arnoglossus brunneus) Scientific name: Arnoglossus brunneus Fowler, 1934 The Brown lefteye flounder (Arnoglossus brunneus) is a marine fish of the family Bothidae. Native range: Western Central Pacific, known only from the east coast of Luzon, Philippines. BiologyDorsal soft rays (total): 108-113; Anal soft rays: 84 - 89. Distal end of pectoral fin on eyed side not blackish. Males without anterior dorsal-fin rays elongate (Ref 42535).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameArnoglossus brunneusFamilyBothidae (Lefteye flounders)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length18.3Depth range267–292 m (876–958 ft)EnvironmentMarine; bathydemersal; depth range 267 - 292 mClimateDeep-waterDistributionWestern Central Pacific: known only from the east coast of Luzon, Philippines.Conservation status (IUCN)Data deficient (DD)Threat to humansHarmlessUsesFisheries: of no interestResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming tmax>3) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026