Superfish Freeze-Dried Tubifex is an excellent natural food with a high protein content. This highly palatable freeze-dried treat is accepted by almost all freshwater and coldwater fish, as well as some aquatic reptiles. Freeze-drying perfectly preserves all nutrients and eliminates pathogens, making it a safe and nutritious food! Give your fish what they eat in the wild by combining freeze-dried food with your regular daily food to provide your fish with a varied diet.