BIO-PURE FD is the world's cleanest freeze-dried fish food available today. Pharmaceutical freeze-drying techniques allow us to give you a product as close to fresh as humanly possible. Expect a texture and taste not previously available in a freeze-dried food. If you're looking for an excellent daily diet or treat for your smaller freshwater fish, turtles or lizards, look no further. Bio-PURE FD Tubifex Worms, your best choice from the quality leader, Hikari!!