Premium Bloodworm is packaged fresh and then frozen locally here in the Midwest. Bloodworm (Chironomids) are midge fly larvae and like all insect larvae they are the ideal food for all fish. The Chinese people have been raising fancy goldfish on a diet of bloodworm for centuries. Available in many pack sizes including cubes. This product when thawed for feeding will come out as whole animals, not bits and pieces and does not contain any binders, gels or preservatives like the other mass producers that manufacture the products to six months plus on the shelves. There is nothing added that can harm your fish just bloodworm. This is the freshest, finest foods and what we feed in our fish room to our livestock. Perfect for Discus, Angelfish, Betta's, Killifish, all Livebearers, Loaches, Corydoras and just about everything will benefit from Bloodworm.