HomeFish encyclopediaRay-finned fishesFlatfishesLefteye floundersLarge-crested lefteye flounder Large-crested lefteye flounder (Arnoglossus macrolophus) Scientific name: Arnoglossus macrolophus Alcock, 1889 The Large-crested lefteye flounder (Arnoglossus macrolophus) is a marine fish of the family Bothidae. BiologyDorsal soft rays (total): 83-98; Anal soft rays: 65 - 77; Vertebrae: 41 - 42. Body with a large dark spot posteriorly on the base of both the dorsal and anal fins and with elongated anterior rays in the dorsal fin.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameArnoglossus macrolophusFamilyBothidae (Lefteye flounders)OrderPleuronectiformes (Flatfishes)ClassActinopterygii (Ray-finned fishes)Maximum length13.0Depth range18–141 m (59–463 ft)EnvironmentMarine; demersal; depth range 18 - 141 mClimateTropicalDistributionIndo-West Pacific: Persian Gulf and Red Sea, through the northern Indian Ocean to the South China Sea, north to southern Japan and south to the Indo-Australian Archipelago and New Caledonia. Report from Madagascar needs confirmation.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026