Morio Worm

Zophobas morio is a species of darkling beetle, whose larvae are known by the common name superworm or zophobas. Superworms are common in the reptile pet industry. In the search for easy to raise insects to use as food for captive reptiles and amphibians, superworms quickly moved into the spotlight, and have been a staple feeder insect ever since.

These insect larvae resemble very large mealworms, about 1 1/2 to 2 1/4 inches long. Once they reach adult size, the larvae pupate, and later emerge as large, black beetles. The larvae will not pupate if kept in a container with many other larvae, where they receive constant bodily contact. Keeping superworms this way is commonly used to hinder pupation.

Superworms are readily accepted by lizards, turtles, frogs, salamanders, birds, Koi and other insectivorous animals. Their hard chitin may make them less suitable for arachnids and some predatory insects. Their nutritional values are similar to those of mealworms, so supplementation with calcium is necessary if they are used as a staple food item. They are odor-free (but the beetles release some odor if provoked), and can be easily contained with little to no risk of escapes, making them ideal for raising at home to feed a collection of captive insectivores.