HomeFish encyclopediaRay-finned fishesPerch-like fishGunnelsRockweed gunnel Rockweed gunnel (Apodichthys fucorum) Scientific name: Apodichthys fucorum Jordan & Gilbert, 1880 The Rockweed gunnel (Apodichthys fucorum) is a marine fish of the family Pholidae. Native range: Eastern Pacific, Banks Island, British Columbia, Canada to Punta Escarpada, central Baja California, Mexico. BiologyDorsal spines (total): 83 - 84; Dorsal soft rays (total): 0; Anal spines: 1; Anal soft rays: 32 - 38. Caudal rounded. Pectorals small.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameApodichthys fucorumFamilyPholidae (Gunnels)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length23.0Depth range9 m (30 ft)EnvironmentMarine; demersal; depth range ? - 9 mClimateSubtropicalDistributionEastern Pacific: Banks Island, British Columbia, Canada to Punta Escarpada, central Baja California, Mexico.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