HomeFish encyclopediaRay-finned fishesPerch-like fishGobiesLongtail goby Longtail goby (Ctenogobius sagittula) Scientific name: Ctenogobius sagittula G?nther, 1862 The Longtail goby (Ctenogobius sagittula) is a brackish-water fish of the family Gobiidae. Native range: Eastern Pacific, San Diego Bay, California, USA to Peru. BiologyInhabits shallow sand or mud bottoms of bays and estuaries. An intertidal species that actively shuttles back and forth between rock pools and air. Breathes air when out of water.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCtenogobius sagittulaFamilyGobiidae (Gobies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length20.0EnvironmentMarine; brackish; demersalClimateSubtropicalDistributionEastern Pacific: San Diego Bay, California, USA to Peru.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessResilienceMedium, minimum population doubling time 1.4 - 4.4 years (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