Tidewater Goby

Eucyclogobius newberryi

The tidewater goby is an endangered species with an elongated body that has a standard body length of approximately 2 inches.  In general, the Eucyclogobius newberryi has a grey- brown coloring.  While male gobies are almost fully transparent, females differ with darker colors such as black on the body and dorsal/anal fins (1).  Niches include seasonally closed estuaries and lagoons along the California coastline.  This particular species is euryhaline and remains closer to freshwater ecosystems although utilizes the sea for dispersal as larvae (2).  Some interesting facts include that gobies were declared an endangered species in 1994.  Recovery is favored since gobies are opportunistic feeders and have rapid reproductive rates.  Also, the tidewater goby is sex-role reversed in which the female is more competitive than males when searching for potential mates (3). 



  • Esturaries/Lagoons along CA coastline


(1) Tidewater Goby. U.S. Fish and Wildlife Service Arcata Fish and Wildlife Office. https://www.fws.gov/arcata/es/fish/goby/goby.html. Accessed 16 November 2018.


(2) Dawson, M. N., J. L. Staton, and D. K. Jacobs. 2001. Phylogeography of the tidewater goby, Eucyclogobius newberryi (Teleostei, Gobiidae), in coastal California. Evolution 55:1167–1179.


(3) Swenson, R. O. 1999. The ecology, behavior, and conservation of the tidewater goby, Eucyclogobius newberryi. Environmental Biology of Fishes 55:99–114.


(Photograph)  Kevin Lafferty


  • Devereux slough