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Least Killifish

Heterandria formosa

The Least Killifish (Heterandria formosa) is a tropical freshwater fish of the family Poeciliidae. It swims in midwater, close to the bottom. It grows to 3.6 cm (total length). The IUCN Red List rates it Least Concern. In the aquarium it is kept at 20–26 °C.

Size: 3.6 cmtotal length
Temperature: 20–26 °C
pH: 7.0–8.0
Climate zone: Tropical

In the aquarium

Temperature20–26 °C

pH7.0–8.0

Hardness5–20 °dGH

In the wild

Water type: Freshwater
Climate zone: Tropical
Habitat: Midwater, close to the bottom
Aquarium trade: Traded commercially

Conservation status

Classification

OrderCyprinodontiformes
FamilyPoeciliidae
GenusHeterandria
SpeciesHeterandria formosa

Quick answers

Least Killifish size: how big does it get?: It grows to 3.6 cm (total length).
Least Killifish water parameters: what does it need?: Temperature 20–26 °C, pH 7.0–8.0, hardness 5–20 °dGH.
Least Killifish: is it endangered?: The IUCN Red List rates it Least Concern.