HomeFish encyclopediaRay-finned fishesGrinnersAulopusRoyal flagfin Royal flagfin (Aulopus filamentosus) Scientific name: Aulopus filamentosus Bloch, 1792 The Royal flagfin (Aulopus filamentosus) is a marine fish of the family Aulopidae. Native range: Eastern Atlantic, Canary Islands south to Cape Verde and Senegal. Also recorded from the Mediterranean. Western Central Atlantic: Gulf of Mexico and Caribbean. BiologyFound on continental shelf and upper slope.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAulopus filamentosusFamilyAulopidae (Aulopus)OrderAulopiformes (Grinners)ClassActinopterygii (Ray-finned fishes)Maximum length44.0Common length30.0Depth range50–1000 m (164–3281 ft)EnvironmentMarine; demersal; depth range 50 - 1000 m, usually 100 - 200 mClimateSubtropicalDistributionEastern Atlantic: Canary Islands south to Cape Verde and Senegal. Also recorded from the Mediterranean. Western Central Atlantic: Gulf of Mexico and Caribbean.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Assuming tm=2-4) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026