Tenebrio molitor, commonly known as the mealworm, is the larval stage of the darkling beetle. These small, yellowish-brown larvae are often found in stored grains and are known for their ability to thrive in various environments. Mealworms are a popular food source for pets and are increasingly used in human diets due to their high protein content. Mealworms undergo a complete metamorphosis, transitioning from egg to larva, then to pupa, and finally to adult beetle. They are often raised in controlled environments for use in animal feed, as well as in sustainable food practices, contributing to discussions about alternative protein sources.