HomeFish encyclopediaRay-finned fishesScorpionfishes and FlatheadsSculpinsNorway bullhead Norway bullhead (Micrenophrys lilljeborgii) Scientific name: Micrenophrys lilljeborgii Collett, 1875 The Norway bullhead (Micrenophrys lilljeborgii) is a brackish-water fish of the family Cottidae. BiologyDiffers from Taurulus bubalis by the row of bony knobs above the rough lateral line and by the 2 soft rays in the anal fin.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameMicrenophrys lilljeborgiiFamilyCottidae (Sculpins)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length7.4Common length6.0Depth range0–100 m (0–328 ft)EnvironmentMarine; brackish; demersal; depth range 0 - 100 mClimateTemperateDistributionNortheast Atlantic: Norwegian coasts to Namdahl to off Denmark, around British Isles and across to Iceland. Pelagic larvae spreading to western Murman and Icelandic waters.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, 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