Can O' Worms are retorted (cooked in the can) mealworms. This unique cooking process locks in the flavor and freshness. The exoskeleton is softened for easier digestibility. You will be amazed how readily your animals will take to this food. Ideal for reptiles; birds or fishing. Check out Canned Insects and other Invertebrates - An Important New Food for Pet Reptiles and Amphibians written by former Bronx Zoo Herpetologist Frank Indiviglio at That Reptile Blog.