Shortfin Molly - Poecilia mexicana
This tropical aquarium fish is an illegally released pet fish. The native range is southeastern United States, Mexico, and Central America.
Specimens from Montana waters have been nearly all black or heavily blotched with black on body and fins. Some have orange on tail fin.
Observations in Montana Natural Heritage Program Database
Number of Observations:
(Click on the following maps and charts to see full sized version)
Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Can exist in Montana only in warm springs of ponds and streams resulting from these.
Diet varied. Feeds on both plant and animal matter. Vascular plants and mosquito larvae are important items in the diet.
Reaches Sexual maturity at 1.5 - 2 in. in length. Under suitable conditions may produce several broods a year. Fertilization internal; young born alive.
- Additional Sources of Information Related to "Fish"