Made with premium fruit fly food, and packaged using excelsior. Right from the bioactive boss. Drosophila hydei will be 21-23 days old when you receive it. Drosophila hydei are larger about 1/8" and are an ideal food for poison dart frogs, fish, praying mantis, young frogs and toads, and other reptiles, amphibians, or captive animals that require small foods.