Least Killifish

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Least Killifish, scientific name Heterandria Formosa, is the smallest livebearers fish living in North America.
The adult least killifish is less than 1 inch long. The small size and interesting behavior makes least killifish the most desirable fish for small size sustaining aquariums.

Least Killifish Diet

Least Killifish Mating


Least Killifish Eating Grindal Worms


Feeding Fish Live Worms First Time


The Smallest Aquarium Fish


Least Killifish eating Vinegar Eels


Stalker or Devoted male fish


Adorable Least Killifish male


Least Killifish breeding tank


Least Killifish Livebearers the beginning