Caenorhabditis elegans is a small, transparent roundworm that is commonly used as a model organism in biological research. Measuring about 1 millimeter in length, it has a simple body structure and a well-mapped genome, making it ideal for studying genetics, development, and neurobiology. This nematode is found in soil and decaying organic matter, feeding on bacteria. Its life cycle is rapid, completing development from egg to adult in about three days, which allows researchers to observe multiple generations in a short time. C. elegans has contributed significantly to our understanding of cellular processes and disease mechanisms.