Heterandria formosa

The Least Killifish is one of the smallest vertebrates in the world, making it ideally suited for small community tanks. Its peaceful nature makes it compatible with similarly small and non-aggressive tank mates. They are livebearers like other members of the Poeciliidae family, and breeding in captivity is relatively effortless. Their diet should include micro-pellets, brine shrimp, or other appropriately sized food.