The Tecopa pupfish (Cyprinodon nevadensis calidae) is an extinct subspecies of the Amargosa pupfish (Cyprinodon nevadensis). The small, heat-tolerant pupfish was endemic to the outflows of a pair of hot springs in the Mojave Desert of California. Habitat modifications and the introduction of non-native species led to its extinction in about 1970.
Read more about Tecopa Pupfish: Taxonomy, Description and Behavior, Decline and Extinction