HomeFish encyclopediaRay-finned fishesSticklebacks and SeamothsSticklebacks and tubesnoutsSea stickleback Sea stickleback (Spinachia spinachia) Scientific name: Spinachia spinachia Linnaeus, 1758 The Sea stickleback (Spinachia spinachia) is a brackish-water fish of the family Gasterosteidae. Native range: Northeast Atlantic, north-western Europe. BiologyDorsal spines (total): 14 - 17. Front of body brassy-yellow in the male, with larger pectoral fins than in the female.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSpinachia spinachiaFamilyGasterosteidae (Sticklebacks and tubesnouts)OrderGasterosteiformes (Sticklebacks and Seamoths)ClassActinopterygii (Ray-finned fishes)Maximum length22.0EnvironmentMarine; brackish; benthopelagic; non-migratoryClimateTemperateDistributionNortheast Atlantic: north-western Europe.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interestResilienceHigh, minimum population doubling time less than 15 months (K=1.78; tm=1) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026