Fin's Fish Guide
The Potosi pupfish (Cyprinodon alvarezi) is a freshwater fish of the family Cyprinodontidae that grows up to 5 cm.
Description
The Potosi pupfish is a small pupfish (Cyprinodontidae) originally endemic to a single spring (El Potosi) in northeastern Mexico. The species grows to about 5 cm and has a stocky body; courting males colour steel-blue, females are brownish with spots. It grazes algae and snaps at small invertebrates. As its spring has dried up, the species is extinct in the wild and survives only in captivity; it is regarded as critically endangered. The fish is harmless to humans.
Frequently asked questions
How do you recognise the Potosi pupfish?
The Potosi pupfish has a torpedo-shaped body and is mainly blue.
Where does the Potosi pupfish live?
The Potosi pupfish lives in fresh water and is mostly found around open water. North America: Mexico
How big does the Potosi pupfish get?
The Potosi pupfish grows to a maximum of about 5 cm. On average the species is around 4 cm.
Is the Potosi pupfish dangerous to humans?
No, the Potosi pupfish is harmless to humans. This species is harmless to humans. No specific first aid is needed. Still handle the fish with care: mind the fin rays and the sharp edges of the gill cover, and rinse any scratch with clean water and cover it. For a dirty or deep wound check tetanus status.
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All data
Identification
Appearance
Habitat & distribution
Behaviour & biology
For anglers
Safety
Status & sources
Same genus Cyprinodon
More from the family Cyprinodontidae
Want the complete picture on the Potosi pupfish?
Point your camera at the fish and Fin names the species in seconds. Free, and the Potosi pupfish is one of 12,519 species in the app.