HomeFish encyclopediaRay-finned fishesSilversidesNeotropical silversidesDelta silverside Delta silverside (Colpichthys hubbsi) Scientific name: Colpichthys hubbsi Crabtree, 1989 The Delta silverside (Colpichthys hubbsi) is a brackish-water fish of the family Atherinopsidae. Native range: Eastern Central Pacific, endemic to the Gulf of California, from the delta of the Colorado River to 31?N. BiologyFound on sandy and muddy bottoms of coastal areas, estuaries and lagoons. Adults feed on crustaceans, gastropods, and may take in sand.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameColpichthys hubbsiFamilyAtherinopsidae (Neotropical silversides)OrderAtheriniformes (Silversides)ClassActinopterygii (Ray-finned fishes)Maximum length15.0Common length11.6EnvironmentMarine; brackish; pelagic-neriticClimateSubtropicalDistributionEastern Central Pacific: endemic to the Gulf of California, from the delta of the Colorado River to 31?N.Conservation status (IUCN)Endangered (EN) (B1ab(i,ii,iii))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