HomeFish encyclopediaRay-finned fishesCodsHakes and burbotsFivebeard rockling Fivebeard rockling (Ciliata mustela) Scientific name: Ciliata mustela Linnaeus, 1758 The Fivebeard rockling (Ciliata mustela) is a marine fish of the family Lotidae. Native range: Northeast Atlantic, Lisbon north to Finnmark, around the British Isles, in the Skagerrak and Kattegat and Iceland. BiologyDorsal spines (total): 0; Anal spines: 0. Head relatively small, more than five times in SL. No lobed fold of skin above the upper lip. First fin ray followed by a row of small, fleshy filaments. Dark brown dorsally, reddish to blackish grading to pale gray-brown ventrally. One barbel on the lower jaw and four on the snout.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCiliata mustelaFamilyLotidae (Hakes and burbots)OrderGadiformes (Cods)ClassActinopterygii (Ray-finned fishes)Maximum length25.0Common length20Depth range17–22 m (56–72 ft)EnvironmentMarine; demersal; oceanodromous; depth range 17 - 22 mClimateTemperateDistributionNortheast Atlantic: Lisbon north to Finnmark, around the British Isles, in the Skagerrak and Kattegat and Iceland.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercialResilienceHigh, minimum population doubling time less than 15 months (tm=1; tmax=3; Fec=9,000-30,000) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026