With copper-blue blood prized by modern medicine and a body plan older than dinosaurs, the horseshoe crab reveals how ancient ...

Horseshoe crabs have been around for 400 million years, but without protection, they could vanish from SC coast, ...

Several locals have reported "unusual amounts of dead horseshoe crabs" washing up on Massachusetts beaches in recent days. However, officials say the spectacle is no cause for concern, as they're just ...

In response to worried reports about “dead horseshoe crabs washing up” on some Massachusetts beaches, the state’s division of Marine Fisheries is assuring people that all is well. “It’s OK, the ...

Horseshoe crabs — with their spidery legs, shield-like shells and long tails — might look intimidating. But they’re quite helpless when their awkward bodies flip upside down, and they can’t get ...

An environmental advocacy group is suing the federal government to force regulators to decide if the American horseshoe crab, ...

When was the last time you said "I love you" to a horseshoe crab? You'll have the perfect chance on June 20, when Cape Cod celebrates International Horseshoe Crab Day. Local organizations have ...

A conservation group sued President Donald Trump's administration on Monday over its failure to act on protecting American ...

This guest essay reflects the views of Carl Safina, endowed professor for nature and humanity at Stony Brook University. Plenty of people have never seen a horseshoe crab. Of those who have, plenty ...

If you happen upon an overturned horseshoe crab on the beach this summer, don't be afraid to give it a helping hand. Though they look menacing, horseshoe crabs do not bite or sting. The tail, which ...

A sudden splash pierces the silent ocean depths. Divers' lights pierce the murk, revealing a coelacanth—its lobed fins ...

The best time to see the ancient wonders that are horseshoe crabs is now, as they return to Delaware Bay beaches for spawning season. Horseshoe crabs first developed 540 million years ago in the ...