Hikari Bio-Pure Freeze-Dried Tubifex Worms are a great treat or daily diet for goldfish, certain reptiles and tropical fish, discus, small freshwater fishes, turtles, and some lizards. Made using pharmaceutical freeze-drying techniques, this product is as close to fresh as humanly possible and has a texture and taste not previously available in freeze-dried food. These worms are multi-vitamin rich to reduce stress and stress related diseases, and are nitrogen charged to reduce oxidation prior to opening. Once opened, oxygen absorbers reduce oxidation, which means less waste and lower cost per feeding. Freeze-Dried Tubifex Worms are packed in convenient, small cubes to help eliminate overfeeding, monitor how much your pets are eating, and avoid water clouding. In addition, they are free of parasites and harmful bacteria.