Least Killifish | Heterandria formosa g.br.

Least Killifish

The Least Killifish (Heterandria formosa g.br.) is a captivating freshwater fish species renowned being the world's smallest livebearer. With hues ranging from iridescent greens to blues and yellows, it serves as an intriguing subject for observation in aquarium settings. This species, known for its peaceful demeanor, is particularly suitable for community tanks and smaller aquatic environments due to its compact dimensions.

Fascinatingly, the Least Killifish is a livebearer, meaning it gives birth to fully developed fry rather than laying eggs. This reproductive strategy adds an educational dimension to observing their breeding behaviors, making them an excellent choice for hobbyists interested in understanding aquatic life cycles. Additionally, their hardy nature and adaptability to a variety of water conditions make them an accessible option for aquarists at all levels of expertise.

Adult Size: 1.5 inches

Please Note: All fish shipments have a 100% Live Arrival Guarantee when shipping with FedEx Overnight (1 Day) option. All other options void our Live Arrival Guarantee for fish. 

Our Tank Parameters

• Ph: 5.0 to 7.5
• Gh: 8 to 16
• Kh:  4 to 7
• TDS: 180 to 250
• Temp: 68 to 79

Tank Recommendations

• Plants:Guppy Grass, water sprite, java ferns
• Wood:Mopani, Malaysian driftwood
• Substrate:Brightwell Rio Cafe or Rio Escuro