An enzyme in the blue blood has been key to testing vaccines since the 1980s, raising concerns for the crabs’ population. But ...

Along the Atlantic Coast, one species is supporting ecological and human health — the American horseshoe crab. In Maryland, horseshoe crabs are a common site on the coast and in coastal bays. Harvest ...

Horseshoe Crabs have been around for 450 million years but are now declining rapidly due to over harvesting. These primeval creatures were living in the oceans before the rise of dinosaurs but are now ...

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 ...

A new study looking at horseshoe crabs in the Long Island Sound confirms the ancient creatures face potential extinction. The threat stems from climate change, loss of habitat, and overharvesting.

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 ...

a, A complete specimen with antennae and limbs (USNM PAL 65510). b, Limbs of GSC 34695a showing various degrees of flexure and extension. The Burgess Shale in British Columbia is renowned for its ...

Horseshoe crabs are not endangered or threatened in Massachusetts, but their numbers are at historic lows. To protect the species, state wildlife officials are rolling out new regulations. As of 2024, ...

At Stage Harbor in Chatham, Derek Perry, the state’s horseshoe crab biologist, walks the shoreline, counting how many horseshoe crabs fall within a 25-square-meter area. It’s not an easy task, ...