Least Killifish Care Guide
Heterandria formosa
Stocking Calculator
Bioload Score
400
PeacefulEasyFreshwater
- Max Size
- 3.5 cm / 1.4"
- Temperature
- 20–27°C (68–80°F)
- pH Range
- 6.5 – 7.5
- Min Tank Size
- 20L (5 gal)
- Min Group Size
- 5 fish
- Tank Level
- Bottom-Mid
- Origin
- North America
- Temperament
- Peaceful
- Difficulty
- Easy
- Breeding Difficulty
- Easy
Diet
Omnivorous; feeds on algae, microorganisms, and small invertebrates.
Community Compatibility
Ideal for community tanks with other small, peaceful species.
Good to Know
Least Killifish is one of the smallest fish species in the world, often used in nano tanks and are prolific livebearers.
Gender Differences
Males are smaller and slimmer than females.
Stock Least Killifish in Your Tank
Use our free stocking calculator to see if Least Killifish fits your aquarium