HomeFish encyclopediaRay-finned fishesPerch-like fishGobiesTidewater goby Tidewater goby (Eucyclogobius newberryi) Scientific name: Eucyclogobius newberryi Girard, 1856 The Tidewater goby (Eucyclogobius newberryi) is a brackish-water fish of the family Gobiidae. Native range: Eastern Pacific, Del Norte County in northern California, USA to Del Mar in southern California. BiologyInhabits coastal lagoons and brackish bays at mouth of freshwater streams. IS subjected to wide variation in salinity (1-28 ppt.) and temperature (9-25?C) both within and among habitat types. The substrate and vegetation can also differ among lagoon, creek and marsh habitats. Feeds mainly on crustaceans, dipteran larvae, gastropods, and invertebrate eggs. Oviparous. Males construct nesting burrows.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEucyclogobius newberryiFamilyGobiidae (Gobies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length5.7Common length4.3EnvironmentMarine; brackish; demersalClimateSubtropicalDistributionEastern Pacific: Del Norte County in northern California, USA to Del Mar in southern California.Conservation status (IUCN)Vulnerable (VU) (A1c+2c)Threat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (tmax=1) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026