HomeMarine aquarium fishOther marine fishGrunt sculpin Grunt sculpin (Rhamphocottus richardsonii) Scientific name: Rhamphocottus richardsonii G?nther, 1874 The Grunt sculpin (Rhamphocottus richardsonii) is a marine fish of the family Rhamphocottidae. Native range: North Pacific, Japan to Alaska and at least Santa Monica Bay, southern California, USA. BiologyDorsal spines: 7 - 8; Dorsal soft rays: 12-13; Anal spines: 0; Anal soft rays: 6 - 7. Caudal fin well rounded.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameRhamphocottus richardsoniiFamilyRhamphocottidae (Grunt sculpins)OrderScorpaeniformes (Scorpionfishes and Flatheads)ClassActinopterygii (Ray-finned fishes)Maximum length8.9Depth range0–165 m (0–541 ft)EnvironmentMarine; demersal; depth range 0 - 165 mClimateTemperateDistributionNorth Pacific: Japan to Alaska and at least Santa Monica Bay, southern California, USA.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: public aquariums More other marine fishCabezonScorpaenichthys marmoratusTidepool sculpinOligocottus maculosusNorthern spearnose poacherAgonopsis vulsaSailfin sculpinNautichthys oculofasciatusYellow croakerLarimichthys polyactisPygmy poacherOdontopyxis trispinosaSee all other marine fish SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026