HomeFish encyclopediaRay-finned fishesPerch-like fishGobiesSecret goby Secret goby (Pycnomma semisquamatum) Scientific name: Pycnomma semisquamatum Rutter, 1904 The Secret goby (Pycnomma semisquamatum) is a marine fish of the family Gobiidae. Native range: Eastern Central Pacific, Gulf of California. BiologyInhabits crevices and ledges of weed-covered rocky reefs.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePycnomma semisquamatumFamilyGobiidae (Gobies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length6.3Depth range2–20 m (7–66 ft)EnvironmentMarine; reef-associated; depth range 2 - 20 mClimateTropicalDistributionEastern Central Pacific: Gulf of California.Conservation status (IUCN)Data deficient (DD)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