✅ Nano Tank Friendly – Perfect for small aquariums! Least Killifish are one of the smallest livebearers, maxing out around 1.2 inches, making them ideal for 5-10 gallon setups or species tanks. ✅ Peaceful & Community Safe – A gentle and non-aggressive species that thrives with similarly sized peaceful tank mates like shrimp, snails, and micro rasboras. ✅ Livebearers with Personality – Watch natural schooling behavior and enjoy the ease of breeding in a well-maintained planted tank. No special effort needed—fry often survive in dense vegetation! ✅ Easy Care & Hardy – Adaptable to a range of water parameters and great for both beginners and experienced aquarists. Enjoy low-maintenance fishkeeping with this underrated gem. ✅ Tank-Raised & Disease-Free – Responsibly bred in controlled environments to ensure healthy, parasite-free fish ready to thrive in your aquarium. "Discover one of the world�s smallest livebearers�the Least Killifish (Heterandria formosa)�a peaceful, hardy, and fascinating species perfect for nano aquariums. Native to slow-moving waters of the southeastern United States, these tiny fish reach only about 1�1.2 inches in length, making them ideal for small tanks starting at just 5 gallons.