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Least Killifish
Heterandria formosa
Family: Poeciliidae
📍 Southeastern USA, Florida to South Carolina
One of the smallest vertebrates in the world — females reach just 1.5 inches. A fascinating livebearer from the USA that thrives in cool, planted nano tanks. Ideal for a species setup.
Keeping this species
- pH
- 6.0–8.0
- diet
- omnivore
- maxSize
- 1.5 inches
- minTankSize
- 3 gallons
- temperature
- 59–79°F (15–26°C)
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Temperature
59–79°F
15–26°C
Natural Habitat Temperature
57°F — 81°F seasonal range · (Jan low, Jul high)