When the spring high tides strike, tens of thousands of horseshoe crabs descend on the Delaware Bay to spawn. (Steph Yin/WHYY) From Philly and the Pa. suburbs to South Jersey and Delaware, what would ...

Often referred to as a living fossil, the American horseshoe crab, Limulus polyphemus, is one of the most-studied invertebrate animals in the world. It has served as a model in Nobel Prize–winning eye ...

Celebrate World Ocean Day on June 8 by learning about these ancient arthropods Ashley Goetz The ocean has many unusual inhabitants, but few are as strange and ancient as the horseshoe crab. Get to ...

NOAA Fisheries has determined that horseshoe crabs do not warrant listing under the Endangered Species Act (ESA), finding that the petitions to do so lacked the necessary evidence that the species is ...

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, ...