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A small (2.5-5 cm), silvery, live-bearing, guppy-like fish without dark spots on the fins. Males in breeding color are black with yellow fins. There are two listed subspecies of the Sonoran topminnow (P. occidentalis); the Gila topminnow (P. o.occidentalis) of the Gila River basin and the Yaqui topminnow (P.o. sonoriensis) of the Rio Yaqui. Science recognizes these two forms as separate species.

Scientific Name

Poeciliopsis occidentalis
Common Name
Gila topminnow
Gila topminnow (incl. Yaqui)
FWS Category

Location in Taxonomic Tree

Identification Numbers



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6 Items