Male at San Gregorio Spring
A male of Gambusia alvarezi at San Gregorio Spring, Rio Grande drainage [Chihuahua]. Photo by Juan Miguel Artigas Azas. (22-Mar-2007). determiner Juan Miguel Artigas Azas



Arthrophallus (subgenus)



Last updated on:

Gambusia alvarezi Hubbs & Springer, 1957

Become a subscriber

Unlock the full content of this and all other documents, images, and videos by becoming a subscriber of the Freshwater Fishes of Mexico. Get the best information about Mexican freshwater fish! You can also open the full profile for everyone to see by sponsor this species and support the Freshwater Fishes of Mexico

subscribe login

Original description as Gambusia alvarezi:


  • Hubbs, Clark L & Victor G. Springer. 1957. "A revision of the Gambusia nobilis species group, with descriptions of three new species, and notes on their variation, ecology and evolution". Texas Journal of Science. 9(3):279-327 (ffm04561)

Conservation: Gambusia alvarezi is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (DD) data deficient (1996). Gambusia alvarezi has a very limited distribution in and around Ojo de Agua de San Gregorio, which is found in good shape up to our days (May 2023). The small area of the spring is kept isolated by a fence since the water is used for human consumption.