Horseshoe crabs are often referred to as the "living fossils" of our planet—the four known species, including three in Asia ...

The horseshoe crab, particularly the American horseshoe crab (Limulus polyphemus), plays a crucial role in coastal ecosystems, especially in areas like Delaware Bay, where it supports a diverse ...

- large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tail; a living fossil related to the wood louse ...