HomeFish encyclopediaRay-finned fishesCodsHakes and burbotsNorthern rockling Northern rockling (Ciliata septentrionalis) Scientific name: Ciliata septentrionalis Collett, 1875 The Northern rockling (Ciliata septentrionalis) is a brackish-water fish of the family Lotidae. Native range: Northeast Atlantic, around the British Isles and northward along the European coasts to northern Norway. Also found at the Faeroe Islands and Iceland. BiologyFound in the sublittoral zone, on sand or mud bottoms. Feed mostly on decapod crustaceans, lobsters, crabs, mysids and polychaetes. Oviparous. Spawning may take place in deeper waters.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCiliata septentrionalisFamilyLotidae (Hakes and burbots)OrderGadiformes (Cods)ClassActinopterygii (Ray-finned fishes)Maximum length20.0Depth range10–90 m (33–295 ft)EnvironmentMarine; brackish; demersal; oceano-estuarine; depth range 10 - 90 m, usually 10 - 50 mClimateTemperateDistributionNortheast Atlantic: around the British Isles and northward along the European coasts to northern Norway. Also found at the Faeroe Islands and Iceland.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercialResilienceHigh, minimum population doubling time less than 15 months (tm=1; 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