HomeMarine aquarium fishGobies, blennies & dottybacksSeaweed blenny Seaweed blenny (Parablennius marmoreus) Scientific name: Parablennius marmoreus Poey, 1876 The Seaweed blenny (Parablennius marmoreus) is a marine fish of the family Blenniidae. Native range: Western Atlantic, New York (USA), Bermuda, the Bahamas, Gulf of Mexico to southern Brazil. BiologyDorsal spines (total): 12; Dorsal soft rays (total): 18; Anal spines: 2; Anal soft rays: 19 - 20. No median row of cirri; supraorbital cirri branched. With numerous small brown spots; small black spot at front of dorsal fin; edge of anal fin pale.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameParablennius marmoreusFamilyBlenniidae (Combtooth blennies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length8.5Depth range0–10 m (0–33 ft)EnvironmentMarine; reef-associated; depth range 0 - 10 mClimateSubtropicalDistributionWestern Atlantic: New York (USA), Bermuda, the Bahamas, Gulf of Mexico to southern Brazil.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: of no interest; aquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More gobies, blennies & dottybacksYellowhead jawfishOpistognathus aurifronsFire gobyNemateleotris magnificaYellow prawn-gobyCryptocentrus cinctusPersian blennyEcsenius midasMolly millerScartella cristataPearl blennyEntomacrodus nigricansSee all gobies, blennies & dottybacks SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026