In the wild, N. liemi mainly inhabits brooks and the fish like a comparatively strong current in the aquarium. They are livebearing fishes, the females can give birth every 4 to 6 weeks. The young are very big, sometimes even 2.5 cm long! The mothers hunt their babies quite fiercely. Breeding will be only successful if the adults are properly fed; live insects (crickets, flies, buffalo-worms etc.) are an important part of the diet.