Environment: milieu / climate zone / depth range / distribution range
Freshwater; brackish; benthopelagic; pH range: 7.0 - 8.2; dH range: 10 - 40; non-migratory. Tropical; 26°C - 28°C (Ref. 2060)
America: between Suriname and Brazil (not the Atlantic area South of the Laguna dos
Patos basin in Brazil); introduced to the Caribbean.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 7.8 cm TL male/unsexed; (Ref. 111953); common length : 3.8 cm SL male/unsexed; (Ref. 26728); max. published weight: 6.48 g (Ref. 111953)
Morphology | Morphometrics
Widespread in mildly brackish water in canals and drainage ditches at the edges of swamps, but rarely found in freshwater. Feeds on mosquito larvae and has at times been used for control in ponds and reservoirs (Ref. 35237).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Males are very active and also approach the females of other Poecilinae. [Females produce 6 - 10 offspring which follow their mother for a few hours after birth, referring to Ref. 35237.] After 28 days gestation, female gives birth to 100 young or more. Sexual maturity is reached after 3-4 months (Ref. 2060).
Kenny, J.S., 1995. Views from the bridge: a memoir on the freshwater fishes of Trinidad. Julian S. Kenny, Maracas, St. Joseph, Trinidad and Tobago. 98 p. (Ref. 11225)
IUCN Red List Status (Ref. 126983)
Threat to humans
Fisheries: of no interest
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01072 (0.00664 - 0.01729), b=3.25 (3.12 - 3.38), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245
Trophic level (Ref. 69278
): 2.3 ±0.1 se; based on diet studies.
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153
): Low vulnerability (10 of 100).