Poecilia formosa


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Poecilia formosa
Species Authority: (Girard, 1860)
Common Name(s):
English Amazon Molly
Limia formosa Girard, 1859

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2013
Date Assessed: 2012-03-01
Assessor(s): NatureServe
Reviewer(s): Smith, K. & Darwall, W.R.T.
Facilitator/Compiler(s): Hammerson, G.A. & Ormes, M.
Listed as Least Concern in view of the large extent of occurrence, large number of subpopulations, large population size, and lack of major threats. Trend over the past 10 years or three generations is uncertain but likely relatively stable, or the species may be declining but not fast enough to qualify for any of the threatened categories under Criterion A (reduction in population size).

Geographic Range [top]

Range Description: Gulf Coast from Rio Tuxpan, Mexico, north to southern Texas; possibly native to coastal portion of Nueces River and around Kingsville, Texas; certainly native to lower Rio Grande (where common); introduced in San Marcos and San Antonio rivers, Texas (Lee et al. 1980, Page and Burr 1991).
Mexico; United States
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This species is represented by a large number of subpopulations and locations.

Total adult population size is unknown but relatively large.

Trend over the past 10 years or three generations is uncertain but likely relatively stable or slowly declining.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: Prefers backwaters and pools of streams and sluggish ditches with fresh or brackish water; usually over mud.
Systems: Freshwater

Threats [top]

Major Threat(s): Localized threats may exist, but on a range-wide scale no major threats are known.

Conservation Actions [top]

Conservation Actions: Currently, this species is of relatively low conservation concern and does not require significant additional protection or major management, monitoring, or research action.

Citation: NatureServe 2013. Poecilia formosa. The IUCN Red List of Threatened Species. Version 2014.3. <>. Downloaded on 01 April 2015.
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