This is one of Joshs Frogs 32oz Producing Fruit Fly cultures, containing i>Drosophila melanogasteri>, and will be 11-15 days old when you receive it i>Drosophila melanogasteri> are about 116 and are an ideal food for Poison Dart Frogs, fish, Praying Mantids, young frogs and toads, and other reptiles, amphibians, or captive animals that require small foods Each culture is made with Joshs Frogs World Famous Fruit Fly Media, containing vitamins, minerals, and color enhancers that make our cultures produce an amazing amount of flies Joshs Frogs sold over 80,000 Fruit Fly cultures in 2014, making us the largest producer of Fruit Fly cultures in the world How to Feed: Tap the top of the container so that the Fruit Flies will fall to the bottom Then remove the lid, and shake the Fruit Flies into the feeding container Dont forget to dust fruit flies with a quality calcium and multivitamin supplement to ensure optimal nutrition for your pets How to Store: For optimal production, Joshs Frogs i>Drosophila melanogasteri> Fruit Fly cultures should be kept at 75-78F and 60-80% humidity This culture should produce for about 2 weeks if kept in these conditions