HomeFish encyclopediaRay-finned fishesPerch-like fishGobiesAmerican shadow goby American shadow goby (Quietula y-cauda) Scientific name: Quietula y-cauda Jenkins & Evermann, 1889 The American shadow goby (Quietula y-cauda) is a brackish-water fish of the family Gobiidae. Native range: Eastern Pacific, Morro Bay in central California, USA to the Gulf of California. BiologyFound in mud flats of lagoons and river mouths. Sometimes occurs in worm or shrimp burrows. Oviparous. Males guard the eggs which are found attached to the walls of burrows.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameQuietula y-caudaFamilyGobiidae (Gobies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length7.0EnvironmentMarine; brackish; demersalClimateSubtropicalDistributionEastern Pacific: Morro Bay in central California, USA to the Gulf of California.Conservation status (IUCN)Least Concern (LC)Threat 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