The White Sands pupfish (Cyprinodon tularosa) is a species of fish

Fish

Fish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups...

 in the Cyprinodontidae family. It is endemic to the Tularosa Basin

Tularosa Basin

The Tularosa Basin is a graben basin in the Basin and Range Province and within the Chihuahuan Desert, east of the Rio Grande in southern New Mexico, in the Southwestern United States.-Geography:...

 in southern New Mexico

New Mexico

New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

, in the Western United States

Western United States

.The Western United States, commonly referred to as the American West or simply "the West," traditionally refers to the region comprising the westernmost states of the United States. Because the U.S. expanded westward after its founding, the meaning of the West has evolved over time...

. They are only found in two springs and two small streams in southwest
New Mexico. They are found nowhere else in the world.

The White Sands Pupfish has dark eyes and silver scales. They grow from 1 3/4 inches to 2 1/2 inches. Adult males have a slight blue color.

Source

• Gimenez Dixon, M. 1996. Cyprinodon tularosa. 2006 IUCN Red List of Threatened Species. Downloaded on 4 August 2007.
• http://www.wildlife.state.nm.us/education/wildlife_notes/documents/whitesandspupfish.pdf