Premium live daphnia culture, a couple hundred adults per bottle plus juveniles, and they keep reproducing. The classic live food for fish, fry, axolotls and aquatic reptiles. All freshwater, cultured in house in Vermilion, Ohio and bottled fresh the morning it ships. Orders go out Monday through Wednesday only so nothing sits with a carrier over the weekend. 100% live arrival guarantee, if anything shows up DOA I reship it free, no photos or claim forms needed.