Heterandria formosa  Girard, 1859

Least killifish
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Heterandria formosa
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Cyprinodontiformes (Rivulines, killifishes and live bearers) > Poeciliidae (Poeciliids) > Poeciliinae
Etymology: Heterandria: Greek, heteros = other + Greek, andros = male (Ref. 45335).   More on author: Girard.

Environment / Climate / Range Ecology

Freshwater; brackish; benthopelagic; pH range: 7.0 - 8.0; dH range: 9 - 19; non-migratory.   Tropical; 20°C - 26°C (Ref. 1672); 35°N - 25°N

Length at first maturity / Size / Weight / Age

Maturity: Lm ?, range 1 - 1.4 cm
Max length : 3.6 cm TL male/unsexed; (Ref. 5723); common length : 2.1 cm TL male/unsexed; (Ref. 12193)

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

North America: occurs only in the USA from Cape Fear River drainage in North Carolina to southern Louisiana.

Biology     Glossary (e.g. epibenthic)

Inhabits heavily vegetated standing to slow-flowing fresh and brackish water. Feeds on worms, crustaceans and plant matter (Ref. 7020). A truly viviparous fish (Ref. 45952).

Main reference Upload your references | References | Coordinator | Collaborators

Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)

IUCN Red List Status (Ref. 90363)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Aquarium: commercial
FAO(Publication : search) | FisheriesWiki | Sea Around Us

More information

Countries
FAO areas
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Ecology
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Common names
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Eggs
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Age/Size
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Length-weight
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Morphometrics
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Ciguatera
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Internet sources

Alien/Invasive Species database | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | Public aquariums | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5020   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00871 (0.00358 - 0.02119), b=3.14 (2.94 - 3.34), based on LWR estimates for this Subfamily-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  2.7   ±0.22 se; Based on food items.
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (tm = 0.13; tmax = 0.33; Batch Fec = 1-7;).
Vulnerability (Ref. 59153):  Low vulnerability (12 of 100) .
Price category (Ref. 80766):   Unknown.