Yellowfin gambusia

The yellowfin gambusia (Gambusia alvarezi) is a species of fish in the family Poeciliidae. It is endemic to the Rio Conchos of Chihuahua, Mexico,^[2] where it is known as guayacon de san gregorio. This species was described in 1957 by Clark Hubbs and Victor G. Springer with the type locality given as El Ojo de San Gregorio in Chihuahua.^[3] The specific name of this fish honours the Mexican ichthyologist José Alvarez del Villar (1903-1986) for his work on the fishes of Mexico and for his assistance to Clark and Springer.^[4]

Yellowfin gambusia
Conservation status
Data Deficient  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Cyprinodontiformes
Family:	Poeciliidae
Genus:	Gambusia
Species:	G. alvarezi
Binomial name
Gambusia alvarezi C. Hubbs & V. G. Springer, 1957