Why is coelacanth called old four legs?

The coelacanth is often referred to as "old four legs" due to its unique evolutionary history and its physical features. This ancient fish, which was thought to be extinct for about 66 million years until its rediscovery in 1938, possesses lobed pectoral and pelvic fins that resemble limbs, suggesting a close evolutionary relationship to the ancestors of terrestrial vertebrates. The term highlights its significance in understanding the transition from water to land in vertebrate evolution.