There is a relatively new species of mealworm on the market known as Superworms, or “king” mealworms (Zophobas morio). This species naturally grows larger than the artificial giant mealworm, but, according to claims, contain less chitin than mealworms. Presumably, Superworms can be digested by many of those herps who cannot digest giant mealworms. I should add here a rather obvious, but often overlooked point: both regular mealworms and Superworms start off life rather small and the younger ones can be fed to the smaller herps.
Unlike common mealworms, Superworms require no refrigeration. Superworms do not pupate and become beetles at room temperature, as do common mealworms. For optimum “shelf life”, Superworms should be stored at between 70 and 80 degrees Fahrenheit. Remember, do not refrigerate Superworms – it will kill them.
When you receive your Superworms, you should place them in a plastic container with approximately 2 inches of wheat or oat bran or uncooked oatmeal. Cut a raw potato in half and place it cut-side down on top of the bedding. If it is more convenient, you can also feed raw carrot, squash or apple. Your Superworms utilize this food for their moisture requirements. Replace the food every several days, as it tends to get either too dry or moldy.