The animal often described as a "living fossil" is the coelacanth. This ancient fish, first discovered in 1938 off the coast of South Africa, is remarkable for its evolutionary history, as it was believed to have been extinct for approximately 66 million years. Coelacanths are notable for their unique adaptations, such as lobed pectoral fins and a distinctive hollow swim bladder, which contribute to their deep-sea habitat. Their discovery has provided scientists with valuable insights into the evolutionary transition of fish to land animals. Coelacanths serve as a link between ancient species and contemporary marine life.