Tiktaalik is a prehistoric fish that lived about 375 million years ago during the Devonian period. It is significant because it exhibits features of both fish and early land-dwelling animals, making it a key transitional fossil in the study of evolution. Its flat skull and neck allowed it to move its head independently, while its sturdy fins had bone structures similar to the limbs of tetrapods. This creature is often referred to as a "fishapod" due to its unique characteristics. Tiktaalik had lungs and gills, enabling it to breathe air and live in shallow waters. Its discovery has provided valuable insights into the evolutionary transition from aquatic to terrestrial life.