Tribolium castaneum, commonly known as the red flour beetle, is a small insect belonging to the family Tenebrionidae. It is typically found in stored grain products, such as flour and cereals, where it can cause significant damage. The beetle is reddish-brown and measures about 3 to 4 millimeters in length. This species is known for its ability to reproduce quickly, with females laying hundreds of eggs in their lifetime. Tribolium castaneum is often used in scientific research, particularly in studies related to genetics and pest control, due to its short life cycle and ease of maintenance in laboratory settings.