Caenorhabditis elegans is a microscopic nematode (roundworm) that has become a widely used model organism in biology research. This organism is particularly valuable for studying development, genetics, neurobiology, and aging, among other fields. C. elegans has a short lifespan, simple anatomy, and fully sequenced genome, making it easy to manipulate and study in a laboratory setting. Researchers use C. elegans to investigate fundamental biological processes and gain insights into human health and disease.