HomeFish encyclopediaRay-finned fishesFlatfishesLefteye floundersPacific deepwater flounder Pacific deepwater flounder (Monolene maculipinna) Scientific name: Monolene maculipinna Garman, 1899 The Pacific deepwater flounder (Monolene maculipinna) is a marine fish of the family Bothidae. Native range: Eastern Central Pacific, Costa Rica to Peru. Also reported in Nicaragua. BiologyFound on muddy, sandy, or rubble bottoms. Marketed fresh and also utilized as fishmeal.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMonolene maculipinnaFamilyBothidae (Lefteye flounders)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length18.0Depth range205–384 m (673–1260 ft)EnvironmentMarine; bathydemersal; depth range 205 - 384 mClimateDeep-waterDistributionEastern Central Pacific: Costa Rica to Peru. Also reported in Nicaragua.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: commercialResilienceMedium, 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