Shortfin molly (Poecilia mexicana)

Scientific name: Poecilia mexicana Steindachner, 1863

The Shortfin molly (Poecilia mexicana) is a freshwater fish of the family Poeciliidae. In the aquarium it needs water at 22–28°C (72–82°F). Native range: North and Central America, Rio San Juan, Mexico to Guatemala. At least one country reports adverse ecological impact after introduction.

Shortfin molly care at a glance

Temperature: 22–28°C (72–82°F)

Biology

Occurs in warm springs and their effluents, canals and weedy ditches, and stream pools. Food is mainly detritus. Some populations in caves.

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name: Poecilia mexicana
Family: Poeciliidae (Poeciliids)
Order: Cyprinodontiformes (Live bearers, Killifishes and Rivulines)
Class: Actinopterygii (Ray-finned fishes)
Maximum length: 11.0
Common length: 4.0
Environment: Freshwater; brackish;; pH range: 7.0 - 7.5; dH range: 20 - 30 benthopelagic; non-migratory
Climate: Tropical
Distribution: North and Central America: Rio San Juan, Mexico to Guatemala. At least one country reports adverse ecological impact after introduction.
Conservation status (IUCN): Not Evaluated
Threat to humans: Potential pest
Uses: Fisheries: of no interest; aquarium: commercial; bait: occasionally
Resilience: Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.)